rem: FSM().EnterDestructionPhase();
context: PPPInterface::~PPPInterface(){	// TODO:	// remove our iface, so that nobody will access it:	//  go down if up	//  unregister from ppp_manager		FSM().EnterDestructionPhase();		// destroy and remove:	// device	// protocols	// encapsulators	// option handlers		// put all modules (in fModules)}