SilcBool silc_client_set_away_message(SilcClient client,
                                          SilcClientConnection conn,
                                          char *message);

    Sets away `message'.  The away message may be set when the client's
    mode is changed to SILC_UMODE_GONE and the client whishes to reply
    to anyone who sends private message.  The `message' will be sent
    automatically back to the the client who send private message.  If
    away message is already set this replaces the old message with the
    new one.  If `message' is NULL the old away message is removed.
    The sender may freely free the memory of the `message'.  Returns
    FALSE on error.