* Fix reference/zmq having returnvalues in wrong order
* Add missing parameters sections to reference/zmq
* Fix errors being in returnvalues
* Fix typo `zmqpoll/poll.xml`
* Remove useless noise
* Add classname tag for auto linking
* Move callback signature to parameters
* Remove ZMQContext contructor return value
* Fix ZMQContext::getSocket return value
* Fix ZMQSocket::recv return value
* Fix ZMQSocket::recv errors section
Co-authored-by: George Peter Banyard <girgias@php.net>
Closes GH-566.