code: func EncodeFromMacIface(mac, iface string) (*bytes.Buffer, error) {
  	buf := bytes.NewBuffer(nil)
  	entry := MacIface{mac, iface}
  	err := gob.NewEncoder(buf).Encode(entry)
  	return buf, err
  }
docs: // EncodeFromMacIface takes a MAC and an Iface and encodes a gob with a MacIface
  // entry.