Listen only on lo device (#1852373)
    
    Dnsmasq now accepts in default configuration queries only from
    localhost. It received queries from any interface on the computer
    before. It just dropped queries coming from wrong interfaces.
    
    This change makes it listen only on specified interfaces. Queries coming
    from different interfaces would receive ICMP error right away. Makes it
    easier to understand why dnsmasq is not answering to those queries.