Emulate Solaris 8 "sort -y" better.

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 2004-09-06  Paul Eggert  <eggert@cs.ucla.edu>
 
+       * src/sort.c (main): Emulate Solaris 8 and 9 "sort -y", so that
+       "sort -y abc" is like "sort abc" whereas "sort -y 100" is like
+       plain "sort".
+
        * src/od.c: Several changes for POSIX and FreeBSD compatibility.
        (COMMON_SHORT_OPTIONS): Add -B, -D, -e, -F, -H, -I, -L, -O, -s, -X.
        (long_options, main): --strings is now -S, not -s.