Thanks to Tony Finch for the program and the performance figure.
* New adnshost utility - currently only a usage message :-).
* New internal consistency checking with assert if right options set.
+ * New adns_wait_poll function like adns_wait but uses poll, not select.
Incompatible changes:
* RRs with mailboxes never rejected due to strange chars if _raw.
* Do not give -u 0 -g 0 options to install.
* Do not scramble innards when a query on the output queue is cancelled.
* Promise not to change fds in adns_beforepoll (if now is specified).
+ * Correct error messages for qname CNAME foo, foo CNAME bar.
+ * Improved textual error string for _s_prohibitedcname.
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