If we want to be able to move the initialisation in core, we need core to be
aware of that '--color' flag at all time. So we now have the definition in core. That flag
is currently unprocessed without the extensions (will be fixed soon). In
addition the default value for this flag in core is 'never'. Enabling the
extensions change that default value to 'auto'.
This moves the global flag and the --pager=yes logic into core. Only
functionality change is that users now always get a --pager flag and
can enable the pager via the flag without the extension active.
Moving the flag into core exposes a defect in the ro localization,
which will have to be corrected later.
Localizers can now run test-gendoc-$LOCALE.t instead of
test-gendoc.t.
After this change, test-gendoc.t only checks whether there is *some*
localization for the expected set of languages and no others.
Whenever a locale i18n/$LOCALE.po is added, someone needs
to add test-gendoc-$LOCALE.t
