Creates an X.25 client module which describes the X.25 client
    interface in an accessing system, through which X.25 clients gain
    access to a PSDN via an X.25 server in a gateway system.  For
    information about the X25 Client entity, refer to HELP ENTITY
    X25_CLIENT.

    create  [node node-id] x25 client
             [maximum session connections integer]
             [,incoming session template simple-name]

    The Maximum Session Connections and Incoming Session Template
    arguments are optional.