accurately by other means. Reverse the sense of fetch checking from
NO_FETCH_A() and NO_FETCH_AAAA(), etc to NAME_FETCH_A(), NAME_FETCH_AAAA(),
and add address family checks like NO_FETCH_V4() and _V6().
Fix a database dump bug where the A fetches were printed twice rather than
printing the AAAA fetches. Add printing of A6 fetches.