Make sed's -i flag more compatible with what gsed does.

- Reset the hold-space in between files
- quit the editor as soon as a 'q' command is found
- Make sure the temp-file is written back to the original file if we quit
  the editor

temp-file not written back issue found by Time Chase.
Lots of feedback from millert@ and schwarze@
OK millert@

1 files changed, 3 insertions, 2 deletions

diff --git a/usr.bin/sed/extern.h b/usr.bin/sed/extern.h
index 77ed8ef1c5d..772f0bab3ef 100644
--- a/usr.bin/sed/extern.h
+++ b/usr.bin/sed/extern.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: extern.h,v 1.13 2017/08/01 18:05:53 martijn Exp $ */
+/*	$OpenBSD: extern.h,v 1.14 2018/11/14 10:59:33 martijn Exp $ */
 /*-
  * Copyright (c) 1992 Diomidis Spinellis.
  * Copyright (c) 1992, 1993
@@ -53,8 +53,9 @@ __dead void error(int, const char *, ...);
 void	warning(const char *, ...);
 int	 mf_fgets(SPACE *, enum e_spflag);
 int	 lastline(void);
+void	 finish_file(void);
 void	 process(void);
-void	 resetranges(void);
+void	 resetstate(void);
 char	*strregerror(int, regex_t *);
 void	*xmalloc(size_t);
 void	*xreallocarray(void *, size_t, size_t);