(main): Fix some more incompatibilities with POSIX.2,

(e.g. `uniq +3 --' did not work) by invoking getopt_long with
leading '-', resembling what was done to 'sort' on 2001-03-20.
Recognize an +N option only if it is an integer in range, and
(if POSIXLY_CORRECT) only if a file name argument has not been seen;
otherwise silently treat it as a file name.

If the user specifies too many operands, output the first one
in the error message, as a diagnostic aid.

0 files changed, 0 insertions, 0 deletions