Some versions of libvirt/dnsmasq will spawn a child process, so we must
trim output from ps to only show the first (main) process.
With IPv6 networking we might also get a link local address, which we
should skip because it will be different each time, derived from the
random MAC address.
Reviewed-by: Laine Stump <email@example.com>
Signed-off-by: Daniel P. Berrangé <firstname.lastname@example.org>