class type client_endpoint_connector =object..end
This class type provides engines to connect to a service. In order
 to get and activate such an engine, call connect.
method connect : connect_address ->
       Unixqueue.event_system -> connect_status Uq_engines.engineInstantiates an engine that connects to the endpoint given by the
 connect_address argument. If successful, the state of the engine
 changes to `Done(status) where status contains the socket 
 details. The connection is established in the background.
The type of status will correspond to the type of connect address
 (e.g. a `Socket address will return a `Socket status).
The close-on-exec flag of the created socket descriptor is always set. The socket descriptor is always in non-blocking mode.
