--help and --version fixes

[Ulrich Drepper]

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Joseph S. Myers wrote:
> This patch fixes various problems with --help and --version output
> (compared to the GNU Coding Standards requirements) in tools
> distributed with and installed by glibc.

It is not

   if (!strcmp(...))

but instead

   if (strcmp(...) == 0)


The bug report info for argp users is printed for the
ARGP_KEY_HELP_EXTRA key in the help function.  There are plenty examples
for this already.  Not doing it this way increases unnecessarily the
amount of strings which have to be translated.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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