use netmgr for dig/host/nslookup
Update dig and friends to use the network manager API instead of isc_socket.
(mdig and delv have to wait because they use dns_dispatch, so that will have to be converted first.)
Update dig and friends to use the network manager API instead of isc_socket.
(mdig and delv have to wait because they use dns_dispatch, so that will have to be converted first.)