Update libexpat to 2.2.4. Fix copying partial UTF-8 characters.

OK deraadt@

32 files changed, 983 insertions, 159 deletions

diff --git a/lib/libexpat/Changes b/lib/libexpat/Changes
index 147f48288aa..9b62893041d 100644
--- a/lib/libexpat/Changes
+++ b/lib/libexpat/Changes
@@ -2,6 +2,34 @@ NOTE: We are looking for help with a few things:
       https://github.com/libexpat/libexpat/labels/help%20wanted
       If you can help, please get in touch.  Thanks!
 
+Release 2.2.4 Sat Auguest 19 2017
+        Bug fixes:
+            #115  Fix copying of partial characters for UTF-8 input
+
+        Other changes:
+            #109  Fix "make check" for non-x86 architectures that default
+                    to unsigned type char (-128..127 rather than 0..255)
+            #109  coverage.sh: Cover -funsigned-char
+                  Autotools: Introduce --without-xmlwf argument
+             #65  Autotools: Replace handwritten Makefile with GNU Automake
+             #43  CMake: Auto-detect high quality entropy extractors, add new
+                    option USE_libbsd=ON to use arc4random_buf of libbsd
+             #74  CMake: Add -fno-strict-aliasing only where supported
+            #114  CMake: Always honor manually set BUILD_* options
+            #114  CMake: Compile man page if docbook2x-man is available, only
+            #117  Include file tests/xmltest.log.expected in source tarball
+                    (required for "make run-xmltest")
+            #117  Include (existing) Visual Studio 2013 files in source tarball
+                  Improve test suite error output
+            #111  Fix some typos in documentation
+                  Version info bumped from 7:5:6 to 7:6:6
+
+        Special thanks to:
+            Jakub Wilk
+            Joe Orton
+            Lin Tian
+            Rolf Eike Beer
+
 Release 2.2.3 Wed August 2 2017
         Security fixes:
              #82  CVE-2017-11742 -- Windows: Fix DLL hijacking vulnerability
@@ -73,7 +101,7 @@ Release 2.2.2 Wed July 12 2017
              #68  Fix "./buildconf.sh && ./configure" for some versions
                     of Dash for /bin/sh
              #72  CMake: Ease use of Expat in context of a parent project
-                    with multipe CMakeLists.txt files
+                    with multiple CMakeLists.txt files
              #72  CMake: Resolve mistaken executable permissions
              #76  Address compile warning with -DNDEBUG (not recommended!)
              #77  Address compile warning about macro redefinition
@@ -289,7 +317,7 @@ Release 2.1.0 Sat March 24 2012
           #2855609: Dangling positionPtr after error.
           #2990652: CMake support.
           #3010819: UNEXPECTED_STATE with a trailing "%" in entity value.
-          #3206497: Unitialized memory returned from XML_Parse.
+          #3206497: Uninitialized memory returned from XML_Parse.
           #3287849: make check fails on mingw-w64.
         - Patches:
           #1749198: pkg-config support.
diff --git a/lib/libexpat/README.md b/lib/libexpat/README.md
index 0a1777e7eac..7bb55127cba 100644
--- a/lib/libexpat/README.md
+++ b/lib/libexpat/README.md
@@ -1,4 +1,4 @@
-# Expat, Release 2.2.3
+# Expat, Release 2.2.4
 
 This is Expat, a C library for parsing XML, started by
 [James Clark](https://en.wikipedia.org/wiki/James_Clark_(programmer)) in 1997.
@@ -72,47 +72,43 @@ the directories into which things will be installed.
 
 If you are interested in building Expat to provide document
 information in UTF-16 encoding rather than the default UTF-8, follow
-these instructions (after having run `make distclean`):
+these instructions (after having run `make distclean`).
+Please note that we configure with `--without-xmlwf` as xmlwf does not
+support this mode of compilation (yet):
+
+1. Mass-patch `Makefile.am` files to use `libexpatw.la` for a library name:
+   <br/>
+   `find -name Makefile.am -exec sed
+       -e 's,libexpat\.la,libexpatw\.la,'
+       -e 's,libexpat_la,libexpatw_la,'
+       -i {} +`
+
+1. Run `automake` to re-write `Makefile.in` files:<br/>
+   `automake`
 
 1. For UTF-16 output as unsigned short (and version/error strings as char),
    run:<br/>
-   `./configure CPPFLAGS=-DXML_UNICODE`<br/>
+   `./configure CPPFLAGS=-DXML_UNICODE --without-xmlwf`<br/>
    For UTF-16 output as `wchar_t` (incl. version/error strings), run:<br/>
-   `./configure CFLAGS="-g -O2 -fshort-wchar" CPPFLAGS=-DXML_UNICODE_WCHAR_T`
+   `./configure CFLAGS="-g -O2 -fshort-wchar" CPPFLAGS=-DXML_UNICODE_WCHAR_T
+       --without-xmlwf`
    <br/>Note: The latter requires libc compiled with `-fshort-wchar`, as well.
 
-1. Edit `Makefile`, changing:<br/>
-   `LIBRARY = libexpat.la`<br/>
-   to:<br/>
-   `LIBRARY = libexpatw.la`<br/>
-   (Note the additional "w" in the library name.)
-
-1. Run `make buildlib` (which builds the library only).
-   Or, to save step 2, run `make buildlib LIBRARY=libexpatw.la`.
+1. Run `make` (which excludes xmlwf).
 
-1. Run `make installlib` (which installs the library only).
-   Or, if step 2 was omitted, run `make installlib LIBRARY=libexpatw.la`.
+1. Run `make install` (again, excludes xmlwf).
 
-Using `DESTDIR` or `INSTALL_ROOT` is enabled, with `INSTALL_ROOT` being the
-default value for `DESTDIR`, and the rest of the make file using only
-`DESTDIR`.  It works as follows:
+Using `DESTDIR` is supported.  It works as follows:
 
 ```console
 make install DESTDIR=/path/to/image
 ```
 
-overrides the in-makefile set `DESTDIR`, while both
-
-```console
-INSTALL_ROOT=/path/to/image make install
-make install INSTALL_ROOT=/path/to/image
-```
+overrides the in-makefile set `DESTDIR`, because variable-setting priority is
 
-use `DESTDIR=$(INSTALL_ROOT)`, even if `DESTDIR` eventually is defined in the
-environment, because variable-setting priority is
 1. commandline
-2. in-makefile
-3. environment
+1. in-makefile
+1. environment
 
 Note: This only applies to the Expat library itself, building UTF-16 versions
 of xmlwf and the tests is currently not supported.
diff --git a/lib/libexpat/doc/reference.html b/lib/libexpat/doc/reference.html
index 350b9b67cca..efc19f485f1 100644
--- a/lib/libexpat/doc/reference.html
+++ b/lib/libexpat/doc/reference.html
@@ -31,7 +31,7 @@ the underlying XML parser for the open source Mozilla project, Perl's
 other open-source XML parsers.</p>
 
 <p>This library is the creation of James Clark, who's also given us
-groff (an nroff look-alike), Jade (an implemention of ISO's DSSSL
+groff (an nroff look-alike), Jade (an implementation of ISO's DSSSL
 stylesheet language for SGML), XP (a Java XML parser package), XT (a
 Java XSL engine).  James was also the technical lead on the XML
 Working Group at W3C that produced the XML specification.</p>
@@ -360,7 +360,7 @@ off by default.</dd>
 <dd>The number of input bytes of markup context which the parser will
 ensure are available for reporting via <code><a href=
 "#XML_GetInputContext" >XML_GetInputContext</a></code>.  This is
-normally set to 1024, and must be set to a positive interger.  If this
+normally set to 1024, and must be set to a positive integer.  If this
 is not defined, the input context will not be available and <code><a
 href= "#XML_GetInputContext" >XML_GetInputContext</a></code> will
 always report NULL.  Without this, Expat has a smaller memory
@@ -373,7 +373,7 @@ the right MSVC magic annotations correct.  This is ignored on other
 platforms.</dd>
 
 <dt>XML_ATTR_INFO</dt>
-<dd>If defined, makes the the additional function <code><a href=
+<dd>If defined, makes the additional function <code><a href=
 "#XML_GetAttributeInfo" >XML_GetAttributeInfo</a></code> available
 for reporting attribute byte offsets.</dd>
 </dl>
@@ -739,7 +739,7 @@ arguments:</p>
 <dt><code>XML_PARAM_ENTITY_PARSING_NEVER</code></dt>
 <dd>Don't parse parameter entities or the external subset</dd>
 <dt><code>XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE</code></dt>
-<dd>Parse parameter entites and the external subset unless
+<dd>Parse parameter entities and the external subset unless
 <code>standalone</code> was set to "yes" in the XML declaration.</dd>
 <dt><code>XML_PARAM_ENTITY_PARSING_ALWAYS</code></dt>
 <dd>Always parse parameter entities and the external subset</dd>
@@ -767,7 +767,7 @@ include</p>
 
   <li>Stopping parsing completely (simply free or reset the parser
   instead of resuming in the outer parsing loop).  This can be useful
-  if a application-domain error is found in the XML being parsed or if
+  if an application-domain error is found in the XML being parsed or if
   the result of the parse is determined not to be useful after
   all.</li>
 </ul>
@@ -1564,7 +1564,7 @@ at most once per parsed (external) entity. The optional application
 data pointer <code>encodingHandlerData</code> will be passed back to
 the handler.</p>
 
-<p>The map array contains information for every possible possible leading
+<p>The map array contains information for every possible leading
 byte in a byte sequence. If the corresponding value is &gt;= 0, then it's
 a single byte sequence and the byte encodes that Unicode value. If the
 value is -1, then that byte is invalid as the initial byte in a sequence.
@@ -1999,7 +1999,7 @@ return NULL.</p>
 <h3><a name="miscellaneous">Miscellaneous functions</a></h3>
 
 <p>The functions in this section either obtain state information from
-the parser or can be used to dynamicly set parser options.</p>
+the parser or can be used to dynamically set parser options.</p>
 
 <pre class="fcndec" id="XML_SetUserData">
 void XMLCALL
diff --git a/lib/libexpat/examples/elements.c b/lib/libexpat/examples/elements.c
index fe1699c50e8..e3605f3a5dc 100644
--- a/lib/libexpat/examples/elements.c
+++ b/lib/libexpat/examples/elements.c
@@ -3,6 +3,35 @@
    the name of each element to standard output indenting child
    elements by one tab stop more than their parent element.
    It must be used with Expat compiled for UTF-8 output.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #include <stdio.h>
diff --git a/lib/libexpat/examples/outline.c b/lib/libexpat/examples/outline.c
index 2d1e63c368f..0909b75a2e9 100644
--- a/lib/libexpat/examples/outline.c
+++ b/lib/libexpat/examples/outline.c
@@ -1,26 +1,36 @@
-/*****************************************************************
- * outline.c
- *
- * Copyright 1999, Clark Cooper
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the license contained in the
- * COPYING file that comes with the expat distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Read an XML document from standard input and print an element
- * outline on standard output.
- * Must be used with Expat compiled for UTF-8 output.
- */
-
+/* Read an XML document from standard input and print an element
+   outline on standard output.
+   Must be used with Expat compiled for UTF-8 output.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
 
 #include <stdio.h>
 #include <expat.h>
diff --git a/lib/libexpat/lib/ascii.h b/lib/libexpat/lib/ascii.h
index d10530b09bd..c3587e57332 100644
--- a/lib/libexpat/lib/ascii.h
+++ b/lib/libexpat/lib/ascii.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #define ASCII_A 0x41
diff --git a/lib/libexpat/lib/asciitab.h b/lib/libexpat/lib/asciitab.h
index 79a15c28ca1..2f59fd92906 100644
--- a/lib/libexpat/lib/asciitab.h
+++ b/lib/libexpat/lib/asciitab.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 /* 0x00 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
diff --git a/lib/libexpat/lib/expat.h b/lib/libexpat/lib/expat.h
index 7e5bbb7e393..d0735bb5c61 100644
--- a/lib/libexpat/lib/expat.h
+++ b/lib/libexpat/lib/expat.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef Expat_INCLUDED
@@ -1048,7 +1076,7 @@ XML_GetFeatureList(void);
 */
 #define XML_MAJOR_VERSION 2
 #define XML_MINOR_VERSION 2
-#define XML_MICRO_VERSION 3
+#define XML_MICRO_VERSION 4
 
 #ifdef __cplusplus
 }
diff --git a/lib/libexpat/lib/expat_external.h b/lib/libexpat/lib/expat_external.h
index 892eb4bbed7..055be1b3281 100644
--- a/lib/libexpat/lib/expat_external.h
+++ b/lib/libexpat/lib/expat_external.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef Expat_External_INCLUDED
diff --git a/lib/libexpat/lib/iasciitab.h b/lib/libexpat/lib/iasciitab.h
index 24a1d5ccc9a..ce4a4bf7ede 100644
--- a/lib/libexpat/lib/iasciitab.h
+++ b/lib/libexpat/lib/iasciitab.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 /* Like asciitab.h, except that 0xD has code BT_S rather than BT_CR */
diff --git a/lib/libexpat/lib/internal.h b/lib/libexpat/lib/internal.h
index 94cb98e15ca..3c5d6e913d6 100644
--- a/lib/libexpat/lib/internal.h
+++ b/lib/libexpat/lib/internal.h
@@ -18,6 +18,35 @@
 
    Note: Use of these macros is based on judgement, not hard rules,
          and therefore subject to change.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #if defined(__GNUC__) && defined(__i386__) && !defined(__MINGW32__)
diff --git a/lib/libexpat/lib/latin1tab.h b/lib/libexpat/lib/latin1tab.h
index 53c25d76b26..95dfa52b1fb 100644
--- a/lib/libexpat/lib/latin1tab.h
+++ b/lib/libexpat/lib/latin1tab.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 /* 0x80 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
diff --git a/lib/libexpat/lib/nametab.h b/lib/libexpat/lib/nametab.h
index b05e62c77a6..bfa2bd38cd9 100644
--- a/lib/libexpat/lib/nametab.h
+++ b/lib/libexpat/lib/nametab.h
@@ -1,3 +1,35 @@
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
 static const unsigned namingBitmap[] = {
 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 0x00000000, 0x00000000, 0x00000000, 0x00000000,
diff --git a/lib/libexpat/lib/utf8tab.h b/lib/libexpat/lib/utf8tab.h
index 7bb3e77603f..fa0bed6f5d7 100644
--- a/lib/libexpat/lib/utf8tab.h
+++ b/lib/libexpat/lib/utf8tab.h
@@ -1,7 +1,34 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
-*/
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
 
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
 
 /* 0x80 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
 /* 0x84 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
diff --git a/lib/libexpat/lib/winconfig.h b/lib/libexpat/lib/winconfig.h
index 9bf014d7fba..17fea468900 100644
--- a/lib/libexpat/lib/winconfig.h
+++ b/lib/libexpat/lib/winconfig.h
@@ -1,10 +1,33 @@
-/*================================================================
-** Copyright 2000, Clark Cooper
-** All rights reserved.
-**
-** This is free software. You are permitted to copy, distribute, or modify
-** it under the terms of the MIT/X license (contained in the COPYING file
-** with this distribution.)
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef WINCONFIG_H
diff --git a/lib/libexpat/lib/xmlparse.c b/lib/libexpat/lib/xmlparse.c
index 1abce6014ec..cf65db3493e 100644
--- a/lib/libexpat/lib/xmlparse.c
+++ b/lib/libexpat/lib/xmlparse.c
@@ -1,7 +1,33 @@
-/* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
-
-   101bfd65d1ff3d1511cf6671e6aae65f82cd97df6f4da137d46d510731830ad9 (2.2.3+)
+/* 8c6b2be7c6281da65ce05218fc15c339f02a811706340824ab596aa86e1fd51a (2.2.4+)
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #if !defined(_GNU_SOURCE)
diff --git a/lib/libexpat/lib/xmlrole.c b/lib/libexpat/lib/xmlrole.c
index c809ee51482..708507d575b 100644
--- a/lib/libexpat/lib/xmlrole.c
+++ b/lib/libexpat/lib/xmlrole.c
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #include <stddef.h>
diff --git a/lib/libexpat/lib/xmlrole.h b/lib/libexpat/lib/xmlrole.h
index 4dd9f06f976..e5f048eab55 100644
--- a/lib/libexpat/lib/xmlrole.h
+++ b/lib/libexpat/lib/xmlrole.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef XmlRole_INCLUDED
diff --git a/lib/libexpat/lib/xmltok.c b/lib/libexpat/lib/xmltok.c
index db4a5c8ca3e..007aed0640a 100644
--- a/lib/libexpat/lib/xmltok.c
+++ b/lib/libexpat/lib/xmltok.c
@@ -1,8 +1,38 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #include <stddef.h>
+#include <stdbool.h>
+#include <string.h>  // memcpy
 
 #ifdef _WIN32
 #include "winconfig.h"
@@ -363,22 +393,33 @@ utf8_toUtf8(const ENCODING *UNUSED_P(enc),
             const char **fromP, const char *fromLim,
             char **toP, const char *toLim)
 {
-  char *to;
-  const char *from;
-  const char *fromLimInitial = fromLim;
+  bool input_incomplete = false;
+  bool output_exhausted = false;
+
+  /* Avoid copying partial characters (due to limited space). */
+  const ptrdiff_t bytesAvailable = fromLim - *fromP;
+  const ptrdiff_t bytesStorable = toLim - *toP;
+  if (bytesAvailable > bytesStorable) {
+    fromLim = *fromP + bytesStorable;
+    output_exhausted = true;
+  }
 
-  /* Avoid copying partial characters. */
+  /* Avoid copying partial characters (from incomplete input). */
+  const char * const fromLimBefore = fromLim;
   align_limit_to_full_utf8_characters(*fromP, &fromLim);
+  if (fromLim < fromLimBefore) {
+    input_incomplete = true;
+  }
 
-  for (to = *toP, from = *fromP; (from < fromLim) && (to < toLim); from++, to++)
-    *to = *from;
-  *fromP = from;
-  *toP = to;
+  const ptrdiff_t bytesToCopy = fromLim - *fromP;
+  memcpy((void *)*toP, (const void *)*fromP, (size_t)bytesToCopy);
+  *fromP += bytesToCopy;
+  *toP += bytesToCopy;
 
-  if (fromLim < fromLimInitial)
-    return XML_CONVERT_INPUT_INCOMPLETE;
-  else if ((to == toLim) && (from < fromLim))
+  if (output_exhausted)  // needs to go first
     return XML_CONVERT_OUTPUT_EXHAUSTED;
+  else if (input_incomplete)
+    return XML_CONVERT_INPUT_INCOMPLETE;
   else
     return XML_CONVERT_COMPLETED;
 }
diff --git a/lib/libexpat/lib/xmltok.h b/lib/libexpat/lib/xmltok.h
index 752007e8b9e..6d31879b331 100644
--- a/lib/libexpat/lib/xmltok.h
+++ b/lib/libexpat/lib/xmltok.h
@@ -1,5 +1,33 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef XmlTok_INCLUDED
diff --git a/lib/libexpat/lib/xmltok_impl.c b/lib/libexpat/lib/xmltok_impl.c
index 4fa1ff679ce..93328b841a1 100644
--- a/lib/libexpat/lib/xmltok_impl.c
+++ b/lib/libexpat/lib/xmltok_impl.c
@@ -1,8 +1,35 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/* This file is included!
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-/* This file is included! */
 #ifdef XML_TOK_IMPL_C
 
 #ifndef IS_INVALID_CHAR
diff --git a/lib/libexpat/lib/xmltok_impl.h b/lib/libexpat/lib/xmltok_impl.h
index da0ea60a657..a6420f48eed 100644
--- a/lib/libexpat/lib/xmltok_impl.h
+++ b/lib/libexpat/lib/xmltok_impl.h
@@ -1,6 +1,33 @@
 /*
-Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-See the file COPYING for copying permission.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 enum {
diff --git a/lib/libexpat/lib/xmltok_ns.c b/lib/libexpat/lib/xmltok_ns.c
index c3b88fdf4e3..23d31e8e424 100644
--- a/lib/libexpat/lib/xmltok_ns.c
+++ b/lib/libexpat/lib/xmltok_ns.c
@@ -1,8 +1,35 @@
-/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
+/* This file is included!
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-/* This file is included! */
 #ifdef XML_TOK_NS_C
 
 const ENCODING *
diff --git a/lib/libexpat/tests/benchmark/benchmark.c b/lib/libexpat/tests/benchmark/benchmark.c
index efa2858a33e..8fa582f95b5 100644
--- a/lib/libexpat/tests/benchmark/benchmark.c
+++ b/lib/libexpat/tests/benchmark/benchmark.c
@@ -1,3 +1,35 @@
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
 #include <sys/stat.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/lib/libexpat/tests/chardata.c b/lib/libexpat/tests/chardata.c
index 8e4e97a5f39..9a93f597fd7 100644
--- a/lib/libexpat/tests/chardata.c
+++ b/lib/libexpat/tests/chardata.c
@@ -1,7 +1,33 @@
-/* Copyright (c) 1998-2003 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
-
-   chardata.c
+/*
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifdef HAVE_EXPAT_CONFIG_H
diff --git a/lib/libexpat/tests/chardata.h b/lib/libexpat/tests/chardata.h
index 0db4b999b58..193edc7f7f7 100644
--- a/lib/libexpat/tests/chardata.h
+++ b/lib/libexpat/tests/chardata.h
@@ -1,7 +1,34 @@
-/* chardata.h
-
-   Interface to some helper routines used to accumulate and check text
+/* Interface to some helper routines used to accumulate and check text
    and attribute content.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifdef __cplusplus
diff --git a/lib/libexpat/tests/memcheck.c b/lib/libexpat/tests/memcheck.c
index 4a24ddc1e42..23e9fdf43bc 100644
--- a/lib/libexpat/tests/memcheck.c
+++ b/lib/libexpat/tests/memcheck.c
@@ -1,9 +1,34 @@
-/* Copyright (c) 2017 The Expat Maintainers
- * Copying is permitted under the MIT license.  See the file COPYING
- * for details.
- *
- * memcheck.c : debug allocators for the Expat test suite
- */
+/* Debug allocators for the Expat test suite
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/lib/libexpat/tests/memcheck.h b/lib/libexpat/tests/memcheck.h
index 2c927241535..1cc4848280b 100644
--- a/lib/libexpat/tests/memcheck.h
+++ b/lib/libexpat/tests/memcheck.h
@@ -1,11 +1,34 @@
-/* Copyright (c) 2017 The Expat Maintainers
- * Copying is permitted under the MIT license.  See the file COPYING
- * for details.
- *
- * memcheck.h
- *
- * Interface to allocation functions that will track what has or has
- * not been freed.
+/* Interface to allocation functions that will track what has or has
+   not been freed.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifdef __cplusplus
diff --git a/lib/libexpat/tests/minicheck.c b/lib/libexpat/tests/minicheck.c
index a6cae231b75..be1e37e761b 100644
--- a/lib/libexpat/tests/minicheck.c
+++ b/lib/libexpat/tests/minicheck.c
@@ -1,14 +1,44 @@
 /* Miniature re-implementation of the "check" library.
- *
- * This is intended to support just enough of check to run the Expat
- * tests.  This interface is based entirely on the portion of the
- * check library being used.
- */
+
+   This is intended to support just enough of check to run the Expat
+   tests.  This interface is based entirely on the portion of the
+   check library being used.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <setjmp.h>
 #include <assert.h>
+#include <string.h>
 
 #include "internal.h"  /* for UNUSED_P only */
 #include "minicheck.h"
@@ -186,8 +216,10 @@ _fail_unless(int UNUSED_P(condition), const char *UNUSED_P(file), int UNUSED_P(l
        we have a failure, so there's no reason to be quiet about what
        it is.
     */
-    if (msg != NULL)
-        printf("%s", msg);
+    if (msg != NULL) {
+        const int has_newline = (msg[strlen(msg) - 1] == '\n');
+        fprintf(stderr, "ERROR: %s%s", msg, has_newline ? "" : "\n");
+    }
     longjmp(env, 1);
 }
 
diff --git a/lib/libexpat/tests/minicheck.h b/lib/libexpat/tests/minicheck.h
index 3702cf8191d..a2f57ddcad0 100644
--- a/lib/libexpat/tests/minicheck.h
+++ b/lib/libexpat/tests/minicheck.h
@@ -1,11 +1,40 @@
 /* Miniature re-implementation of the "check" library.
- *
- * This is intended to support just enough of check to run the Expat
- * tests.  This interface is based entirely on the portion of the
- * check library being used.
- *
- * This is *source* compatible, but not necessary *link* compatible.
- */
+
+   This is intended to support just enough of check to run the Expat
+   tests.  This interface is based entirely on the portion of the
+   check library being used.
+
+   This is *source* compatible, but not necessary *link* compatible.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/lib/libexpat/tests/runtests.c b/lib/libexpat/tests/runtests.c
index aa95fd377b8..4ad5c8ba9b2 100644
--- a/lib/libexpat/tests/runtests.c
+++ b/lib/libexpat/tests/runtests.c
@@ -1,7 +1,33 @@
-/* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
-   See the file COPYING for copying permission.
-
-   runtest.c : run the Expat test suite
+/* Run the Expat test suite
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifdef HAVE_EXPAT_CONFIG_H
@@ -5671,7 +5697,7 @@ static int XMLCALL
 prefix_converter(void *UNUSED_P(data), const char *s)
 {
     /* If the first byte is 0xff, raise an error */
-    if (s[0] == -1)
+    if (s[0] == (char)-1)
         return -1;
     /* Just add the low bits of the first byte to the second */
     return (s[1] + (s[0] & 0x7f)) & 0x01ff;
@@ -7738,7 +7764,7 @@ START_TEST(test_misc_version)
         fail("Version mismatch");
 
 #if ! defined(XML_UNICODE)
-    if (strcmp(version_text, "expat_2.2.3"))  /* needs bump on releases */
+    if (strcmp(version_text, "expat_2.2.4"))  /* needs bump on releases */
         fail("XML_*_VERSION in expat.h out of sync?\n");
 #endif  /* ! defined(XML_UNICODE) */
 }
diff --git a/lib/libexpat/tests/runtestspp.cpp b/lib/libexpat/tests/runtestspp.cpp
index c35dc583d57..fd3ceaa97a3 100644
--- a/lib/libexpat/tests/runtestspp.cpp
+++ b/lib/libexpat/tests/runtestspp.cpp
@@ -1,6 +1,36 @@
-// C++ compilation harness for the test suite.
-//
-// This is used to ensure the Expat headers can be included from C++
-// and have everything work as expected.
-//
+/* C++ compilation harness for the test suite.
+
+   This is used to ensure the Expat headers can be included from C++
+   and have everything work as expected.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2000-2017 Expat development team
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
 #include "runtests.c"