Updated NEWS for 3.2.x releases
Renamed test_connect_delay to test_immediate

* The ZMQ_CONNECT_DELAY option was renamed to ZMQ_IMMEDIATE
Built zmq_send_const man page properly
Removed inaccurate note in zmq_poll man page
Merge pull request #672 from hintjens/master

Renamed test_connect_delay to test_immediate to match name of option