Add AF_UNIX to RestrictAddressFamilies (#35)

AF_UNIX is needed so that cgroup_exporter can get user information from sss.

Author: mattmix

packaging/rpm/cgroup_exporter.service

@@ -18,7 +18,7 @@ ProtectHome=yes
 ProtectControlGroups=yes
 ProtectKernelModules=yes
 ProtectKernelTunables=yes
-RestrictAddressFamilies=AF_INET AF_INET6
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
 RestrictNamespaces=yes
 RestrictRealtime=yes
 RestrictSUIDSGID=yes