return command line arguments for shutting down the
        server; this command line is built from the name server
        startup arguments.

def getShutdownArgs(self):
        """return command line arguments for shutting down the
        server; this command line is built from the name server
        startup arguments."""
        shutdownArgs = []
        if self.host:
            shutdownArgs += ['-h', self.host]
        if self.bcport:
            shutdownArgs += ['-p', self.bcport]
        if self.bcaddr:
            shutdownArgs += ['-c', self.bcaddr]
        if self.identification:
            shutdownArgs += ['-i', self.identification]

        return shutdownArgs