SilcBool silc_log_set_file(SilcLogType type, char *filename,
                           SilcUInt32 maxsize,
                           SilcSchedule scheduler);

    Sets `filename', which can be maximum `maxsize' bytes long, as the new
    logging file for the channel `type'.  If you specify an illegal filename
    a warning message is printed and FALSE is returned.  In this case
    logging settings are not changed.

    You can disable logging for a channel by specifying NULL filename, the
    maxsize in this case is not important.  The `scheduler' parameter is
    needed by the internal logging to allow buffered output and thus to
    save HD activity.