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
Renamed new socket options to be clearer

* ZMQ_REQ_STRICT was negative option (default 1) which goes against
  the standard, where defaults are zero. I renamed this to
  ZMQ_REQ_RELAXED.

* ZMQ_REQ_REQUEST_IDS felt clumsy and describes the technical solution
  rather than the problem/requirement. I changed to ZMQ_REQ_CORRELATE
  which seems more explicit.
Updated NEWS for 4.0.0