class type client_endpoint_connector =This class type provides engines to connect to a service. In order to get and activate such an engine, callobject..end
connect.method connect : connect_address ->
       Unixqueue.event_system -> connect_status engineconnect_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.
