Add Dnsmasq for DHCP

Abiquo 4.4 can use Dnsmasq instead of the default DHCP server with the OMAPI protocol. The protocol name for the remote service is “dnsmasq” and the default port is 832. And for VLANs, Dnsmasq uses network namespaces to provide VLAN isolation. Users can switch from DHCP to Dnsmasq using the restore tool.

See Use Dnsmasq for DHCP.