Because of systemd, weston-launch does not need to be setuid

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3111 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
I'm still calling weston-launch as root, so keep the setuid bit anyway

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3112 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Gnome-shell doesn't like to be called directly. apparently logoff and shutdown relies on it

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3113 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Allow gnome-control-center to be called

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3114 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Do the same workaround for gnome-background-panel

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3115 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Fix the issue with icons in gnome-control-center correctly

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3116 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Weston-launch's older setuid socket is no longer needed because of systemd and Weston, disable just that feature, because weston-launch is still useful for starting PAM sessions

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3117 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9