Add TUIC protocol

transport/tuic/address.go

@@ -0,0 +1,10 @@
+package tuic
+
+import M "github.com/sagernet/sing/common/metadata"
+
+var addressSerializer = M.NewSerializer(
+	M.AddressFamilyByte(0x00, M.AddressFamilyFqdn),
+	M.AddressFamilyByte(0x01, M.AddressFamilyIPv4),
+	M.AddressFamilyByte(0x02, M.AddressFamilyIPv6),
+	M.AddressFamilyByte(0xff, M.AddressFamilyEmpty),
+)