isc_socket_cancel() has been called. resquery_senddone() has been fixed
to account for this (there was a race condition because of the faulty
assumption that only ISC_R_CANCELED would be returned after
isc_socket_cancel()).
The interaction of resquery_response() with the dispatcher now has to be
closely reviewed to make sure it does not have a similar problem with
a canceled query. If the faulty assumption hadn't been faulty, it was
fine, but now I'm not so sure.
d20d22616b