Automatic Updates: Disable Automatic updates for Mercurial(HG) and Bazaar(bzr) version control systems in addition to Git and SVN. Props jamescollins. See #22704

Built from https://develop.svn.wordpress.org/trunk@25650


git-svn-id: http://core.svn.wordpress.org/trunk@25567 1a063a9b-81f0-0310-95a4-ce76da25c4cd