OpenBSD/src IUGYAa7usr.bin/sed main.c sed.1

   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@
VersionDeltaFile
1.38+27-21usr.bin/sed/main.c
1.57+6-3usr.bin/sed/sed.1
1.34+6-2usr.bin/sed/process.c
1.14+3-2usr.bin/sed/extern.h
+42-284 files

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