+5976. [cleanup] isc_timer_t objects are now created, started and
+ destroyed in a particular loop, and timer callbacks
+ run in that loop. isc_timer_stop() can still be called
+ from any loop; when run from a different loop than
+ the one associated with the timer, the request will
+ be recorded in atomic variable and the timer will
+ be stopped on the next callback call. [GL #3202]
+
5975. [func] Implement TLS transport support for dns_request and
dns_dispatch. [GL #3529]