rem: void SetInterfaceMTU(uint32 interfaceMTU) { SetMRU(interfaceMTU - fHeaderLength); }
add: bool SetInterfaceMTU(uint32 interfaceMTU) { return SetMRU(interfaceMTU - fHeaderLength); }
context: 		void SetInterfaceMTU(uint32 interfaceMTU)			{ SetMRU(interfaceMTU - fHeaderLength); }