rem: return true;
context: PPPInterface::SetMRU(uint32 MRU){#if DEBUG	printf("PPPInterface: SetMRU(%ld)\n", MRU);#endif		if(Device() && MRU > Device()->MTU() - 2)		return false;		LockerHelper locker(fLock);		fMRU = MRU;		CalculateInterfaceMTU();		return true;}