* RRs with mailboxes never rejected due to strange chars if _raw.
* Lack of a mailbox produces `.' not `<>'.
* Better usage messages (and no default query domain) for adnstest.
+ * Return EAGAIN from _check instead of EWOULDBLOCK.
Bugfixes:
* Do not invoke __autosys indirectly from __procdgram (result: coredump
usually in memmove, unless adns_if_noautosys was used).
* Do not scramble innards when a query on the output queue is cancelled.
+ * Do not close tcp socket twice.
* Mailboxes containing spaces in their names are quoted.
+ * Give ESRCH, not EAGAIN, if _check called with no queries outstanding.
* 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_processany actually does something.
* Fixed typos in adns.h.
General improvements: