(PECL zmq >= 0.5.0)
ZMQSocket::setSockOpt — Set a socket option
   Sets a ZMQ socket option. The type of the value depends on the key.
   See ZMQ Constant Types for more information.
  
key
       One of the ZMQ::SOCKOPT_* constants.
      
valueThe value of the parameter.
Returns the current object. Throws ZMQSocketException on error.