clone_lookup
(*lookup) = clone_lookup(default_lookup,
*lookup = clone_lookup(default_lookup, 1);
lookup = clone_lookup(default_lookup, 1);
lookup = clone_lookup(default_lookup,
lookup = clone_lookup(default_lookup, 1);
clone_lookup(dig_lookup_t *lookold, int servers);
looknew = clone_lookup(lookold, servers);
lookup = clone_lookup(query->lookup, 0);
lookup = clone_lookup(query->lookup, 0);