"tail" now handles obscure POSIX 1003.2-1992 cases better.

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+2004-09-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * NEWS: "tail" now handles obscure POSIX 1003.2-1992 cases better.
+       * src/tail.c (parse_obsolete_option): Renamed from
+       parse_obsolescent_option, since the options are obsolete now.
+       Remove bool *arg; just exit if there's an error.  Revamp to follow
+       POSIX 1003.2-1992 more precisely, to handle cases like "tail -
+       file" and "tail -10 -- file" correctly when we are conforming to
+       the older standard.
+       (main): Adjust to this change.
+       * tests/tail/Test.pm (test_vector): minus-* requires
+       _POSIX2_VERSION=199209 now, to work correctly if there is
+       an input file.  err-1 and err-3 no longer errors if there
+       is another file.
+
 2004-09-09  Paul Eggert  <eggert@cs.ucla.edu>
 
        * src/test.c (usage): Document -r, -w, -x more carefully.