Since libvirtd itself does not shut down the networks it has (auto)started, the init script should handle these so no dnsmasq and iptables rules stay left behind. Reproducible: Always Steps to Reproduce:
Created attachment 256601 [details, diff] libvirtd.init.d-shutdown.networks.patch Shuts down any active networks created / managed by libvirtd.
Thanks for this, Jan. I've added it in libvirt-0.8.7-r1.