waylandloginmanager: documentation

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2979 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
waylandloginmanager: fix check for wlm_ui

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2980 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
waylandloginmanager: wait for the display server to start up in the two features that automatically start up by waylandloginmanager

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2981 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9