Support newer polkit config format to allow communication with libvirtd
    
    Note polkit-0.104 in Fedora 17 doesn't support the newer
    format config of polkit-0.106 in Fedora 18.
    Therefore we ship both formats for the moment.
    
    The new rules are from Federico Simoncelli <fsimonce@redhat.com>
    Fixes bug #858311