use dnsmasq: add configuration to use dnsmasq with WMF config
This CR updates the deb file to add NetworkManager configuration to
instruct the system to use dnsmasq for local name resolution. It also
configures dnsmasq to automatically forward queries for the following
domains to the wikimedia name servers
* (eqiad|codfw|esams|ulsfo|eqsin).wmnet
Change-Id: I708c7aba4f15caf3fa4de689e242824ddad708b9