In 52dce6d, a new credential function was added to Git.pm, based on
git-remote-mediawiki's functions. The logical follow-up is to use
those functions in git-remote-mediawiki.
Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>