cups-systemd-socket.patch: use upstream version of cupsd.socket
Some time ago we were using the following in cupsd.socket:
ListenStream=631
ListenDatagram=0.0.0.0:631
Then later we removed it due to
https://bugzilla.redhat.com/show_bug.cgi?id=842365
Upstream now (2.0rc1) uses
ListenStream=[::1]:631
ListenStream=127.0.0.1:631
which I think avoids the vulnerability (CVE-2012-6094)
so I guess we can actually go along with it.