socketwait class added

      const std::vector<char> Delete(HttpRequest &nreq);

  private:

      void resetConnection();

      void _ensureConnected();

      bool tryHttp3First();

      int readchunk(const char *data,int datasize,int &pos);

      // Non-blocking I/O helpers using poll() for efficient waiting

      size_t _recvBlocking(netplus::buffer &b);

      void _sendAll(const char *data, size_t len);

      void _sendAll(const std::string &data);

      // Shared HTTP/1.x response reader (avoids code duplication)

      std::vector<char> _h1ReadResponse(const std::string &label);

      // HTTP/2 client helpers

      bool _isH2 = false;

      const std::vector<char> _h2Request(const std::string &method,

  private:

      HttpUrl _url;

      std::unique_ptr<netplus::socket> _cltsock;

      netplus::socketwait _sw;

      netplus::x509cert _cert;

  };