Fix Mutter to obey WAYLAND_DISPLAY as the display name

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3048 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Fix kwayland patch

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3049 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9