autopoint: Fix structure of man page.
Reported by Michio Matsuyama <michio.matsuyama@gmail.com> in
<https://savannah.gnu.org/bugs/?61065>.
* gettext-tools/misc/autopoint.in (func_version): Accept a boolean argument.
Adjust wording. Bump copyright year.
Accept an undocumented option '--version-without-config'.
* gettext-tools/man/Makefile.am ($(man_MAN1MISC)): When creating autopoint.1,
pass the option --version-without-config instead of --version to 'autopoint'.
