(PECL zmq >= 0.5.0)
ZMQSocket::bind — Bind the socket
   Bind the socket to an endpoint. The endpoint is defined in format transport://address where 
   transport is one of the following: inproc, ipc, tcp, pgm or epgm.
  
dsn
       The bind dsn, for example transport://address.
      
forceTries to bind even if the socket has already been bound to the given endpoint.
Returns the current object. Throws ZMQSocketException on error.
