Add git:// and mms:// to $wgUrlProtocols
git:// seems like a no-brainer, since we support svn://. mms:// was
originally a proprietary Microsoft protocol, but they released a spec
and there are multiple open-source implementations, so why not. Someone
requested the latter on [[WP:VPT]]:
<http://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&diff=
351780595&oldid=
351776934>
No reason to be stingy about adding $wgUrlProtocols default values, if
they don't take scary actions when clicked, right?