Updated mediawiki/extensions
Project: mediawiki/extensions/AutomaticBoardWelcome  a8b76aebb794f17c1fde5f481c47b10f2ea075e4

Check that there is an unblocked user in the sysop group

Also other minor cleanup

Change-Id: I088de0cfe0fe252296cf563d1bfa70a8e74ed629