Convert --backup to take an optional argument.
treef953474b33344223be1c1488cd344a0407522839
-rw-r--r-- 11651 ABOUT-NLS
-rw-r--r-- 17989 COPYING
-rw-r--r-- 807 GNUmakefile
-rw-r--r-- 7831 INSTALL
-rw-r--r-- 3842 Makefile.maint
-rw-r--r-- 3341 THANKS
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drwxr-xr-x - lib
drwxr-xr-x - m4
drwxr-xr-x - man
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