+2011-02-24 Paul Eggert <eggert@cs.ucla.edu>
+
+ backupfile: remove unnecessary use of m4/dos.m4
+ * m4/backupfile.m4 (gl_BACKUPFILE): Don't require gl_AC_DOS; none
+ of its symbols are used by the backupfile code. backupfile.c does
+ use a symbol HAVE_DOS_FILE_NAMES, but that symbol is meant only
+ for the rare case of programs that want all their backup file
+ names to live within 8+3 limits, and dos.m4 doesn't address that.
+ * modules/backupfile (Files): Remove m4/dos.m4.
+
2011-02-24 Jim Meyering <meyering@redhat.com>
strstr: fix a bug whereby strstr would mistakenly return NULL