typedef void (*SilcNetCallback)(SilcNetStatus status,
                                    SilcStream stream, void *context);

    A callback of this type is returned by silc_net_tcp_create_listener
    and silc_net_tcp_connect functions.  For silc_net_tcp_create_listener
    this callback means that new incoming connection was accepted, and the
    `stream' is the socket stream representing the socket connection.

    For silc_net_tcp_connect this means that we have connected to the
    remote host and the `stream' is the socket stream for the socket
    connection.  The SILC Stream API (such as silc_stream_read, etc.) can
    be used to read and write to the stream.  The created stream is socket
    stream so various SilcSocketStream API functions can be used with
    the `stream'.