'Unregisters TLS handler\'s from owner\'s dispatcher. Take note that encription
can not be stopped once started. You can only break the connection and start over.'

def plugout(self, now=0):

    self._owner.UnregisterHandler('features', self.FeaturesHandler, xmlns=NS_STREAMS)
    self._owner.UnregisterHandler('proceed', self.StartTLSHandler, xmlns=NS_TLS)
    self._owner.UnregisterHandler('failure', self.StartTLSHandler, xmlns=NS_TLS)
