Out of curiosity, what is the contents of your /etc/dnsmasq.d directory? Is there a symlink in there to /etc/dnsmasq.d-available/libvirt-daemon? What is the contents of that file?
Out of curiosity, what is the contents of your /etc/dnsmasq.d directory? Is there a symlink in there to /etc/dnsmasq. d-available/ libvirt- daemon? What is the contents of that file?