Merge branch 'mm/mediawiki-as-a-remote'

* mm/mediawiki-as-a-remote:
  git-remote-mediawiki: allow a domain to be set for authentication
  git-remote-mediawiki: obey advice.pushNonFastForward
  git-remote-mediawiki: set 'basetimestamp' to let the wiki handle conflicts
  git-remote-mediawiki: trivial fixes
  git-remote-mediawiki: allow push to set MediaWiki metadata
  Add a remote helper to interact with mediawiki (fetch & push)