Fix HTTPUpgrade init

transport/internet/config.go

@@ -58,6 +58,8 @@ func RegisterProtocolConfigCreator(name string, creator ConfigCreator) error {
 	return nil
 }
 
+// Note: Each new transport needs to add init() func in transport/internet/xxx/config.go
+// Otherwise, it will cause #3244
 func CreateTransportConfig(name string) (interface{}, error) {
 	creator, ok := globalTransportConfigCreatorCache[name]
 	if !ok {