BUGS:
Arnout Engelen <arnouten@sci.kun.nl> reports servfail is thought conclusive
semicolon should be comment in resolv.conf

WISHLIST:
* Support for as-yet-unrecognised query types.
* Make timeouts configurable.
* `fake' reverse queries (give nnn.nnn.nnn.nnn either always or on error)
* `fake' forward queries (allow nnn.nnn.nnn.nnn -> A)
* DNSSEC compatibility - be able to retreive KEY and SIG RRs
* DNSSEC minimum functionality - ignore Additional when AD set.
* IPv6 name<->address translation - but which version ??
* IPv6 transport.
* Threadsafe version/mode.
* Caching in the library.
* SRV RRs.
* Make port configurable in config file.
* `Nameserver sent bad response' should produce a hexdump in the log
  (see eg mail to ian@davenant Mon, 25 Oct 2004 14:19:46 +0100 re
  `compressed datagram contains loop')




static void postsort_srv(adns_state ads, void *array, int nobjs,
			 const struct typeinfo *typei) {
  fprintf(stderr,"(postsort_srv)\n");
  /* tests:
   *  dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
   *   ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
   *   ./adnshost_s -t srv- _jabber._tcp.jabber.org
   */
}