std::unique_ptr<Connection> -> Ref<Connection>

src/connection.hpp

@@ -259,7 +259,7 @@ struct Connection {
    *   }
    *
    *   void on_data_arrived(std::string_view data,
-   *                        std::unique_ptr<Connection>& conn_ptr) override {
+   *                        Ref<Connection>& conn_ptr) override {
    *     auto* state = static_cast<HttpConnectionState*>(conn_ptr->user_data);
    *     // Use state for protocol processing...
    *   }
@@ -333,6 +333,9 @@ private:
              size_t epoll_index, ConnectionHandler *handler,
              WeakRef<Server> server);
 
+  template <typename T, typename... Args>
+  friend Ref<T> make_ref(Args &&...args);
+
   // Networking interface - only accessible by Server
   int readBytes(char *buf, size_t buffer_size);
   bool writeBytes();