Creates an instance of an event dispatcher outbound stream entity.

    create [node node-id] event dispatcher -
        outbound stream stream-name [maximum buffer size integer]

    An event dispatcher outbound stream entity represents an outgoing
    connection to a sink on a local or remote node.  Stream-name is the
    simplename which identifies this event dispatcher outbound stream
    instance.  Maximum buffer size is an optional argument.

    Example:

    create event dispatcher outbound stream local_stream