Fine tuning DNS options
    
    Add pointer to self to /etc/hosts to avoid chicken/egg problems when
    restarting DNS.
    
    On servers set both dns_lookup_realm and dns_lookup_kdc to false so we don't
    attempt to do any resolving. Leave it to true on clients.
    
    Set rdns to false on both server and client.
    
    https://fedorahosted.org/freeipa/ticket/931