Running libvirt without dnsmasq

[procmem]

Hi, we are trying to document a way for our users to run libvirt without 
dnsmasq to reduce attack surface on the host. We are aware that the default 
network uses it but plan to disable that and use our own custom configured 
networks instead. Uninstalling dnsmasq causes libvirt to refuse to start even 
if the default network is no longer running.   Is this possible or is this 
something that needs code changes upstream?