Make systemd use 0700 mode on cache folders

The provided gssproxy.service unit configures /var/lib/gssproxy/clients
and /var/lib/gssproxy/rcache as "StateDirectory". However, systemd
applies mode 0755 by default on such folders. "StateDirectoryMode" has
to be set too to restrict access to root only.

Signed-off-by: Julien Rische <jrische@redhat.com>

systemd/gssproxy.service.in

@@ -6,6 +6,7 @@ Before=rpc-gssd.service
 [Service]
 ConfigurationDirectory=gssproxy
 StateDirectory=gssproxy gssproxy/clients gssproxy/rcache
+StateDirectoryMode=0700
 Environment=KRB5RCACHEDIR=/var/lib/gssproxy/rcache
 ExecStart=@sbindir@/gssproxy -i
 # This can be changed to notify-reload and ExecReload= can be removed once