Comment # 1 on bug 933043 from James Fehlig

What version of systemd are you using?  210 that is included in 13.2?  AFAICT,
SocketUser and SocketGroup were added in 214.  Other than the annoying journal
entries, the socket gets created with root:root and libvirtd runs fine when
connecting to /var/run/libvirt/libvirt-sock.  Are you seeing any problems
beyond the annoying messages?