* adns_rr_hostaddr naddrs is -1 on temporary failure (as documented).
* Reject TXT RRs with no strings.
* Correct error messages for qname CNAME foo, foo CNAME bar.
* adns_rr_hostaddr naddrs is -1 on temporary failure (as documented).
* Reject TXT RRs with no strings.
* Correct error messages for qname CNAME foo, foo CNAME bar.