Add a small paragraph about some difference with Lua implementation.

Suggestion from Theo Buehler.

OK jmc@ reyk@

1 files changed, 7 insertions, 3 deletions

diff --git a/usr.sbin/httpd/patterns.7 b/usr.sbin/httpd/patterns.7
index 2bdb8da0f8d..8ef55000604 100644
--- a/usr.sbin/httpd/patterns.7
+++ b/usr.sbin/httpd/patterns.7
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: patterns.7,v 1.3 2015/06/27 04:22:52 semarie Exp $
+.\"	$OpenBSD: patterns.7,v 1.4 2015/06/30 08:28:38 semarie Exp $
 .\"
 .\" Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
 .\" Copyright (C) 1994-2015 Lua.org, PUC-Rio.
@@ -23,9 +23,9 @@
 .\" SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 .\"
 .\" Derived from section 6.4.1 in manual.html of Lua 5.3.1:
-.\" $Id: patterns.7,v 1.3 2015/06/27 04:22:52 semarie Exp $
+.\" $Id: patterns.7,v 1.4 2015/06/30 08:28:38 semarie Exp $
 .\"
-.Dd $Mdocdate: June 27 2015 $
+.Dd $Mdocdate: June 30 2015 $
 .Dt PATTERNS 7
 .Os
 .Sh NAME
@@ -302,3 +302,7 @@ It was turned into a native C API for
 .Xr httpd 8
 by
 .An Reyk Floeter Aq Mt reyk@openbsd.org .
+.Sh CAVEATS
+A notable difference with the Lua implementation is the position in the string
+returned by captures. It follows the C-style indexing (position starting from
+0) instead of Lua-style indexing (position starting from 1).