TSG-9390 修复由于HTTP2流窗口限制导致部分大于6M文件hijack下载失败

plugin/protocol/http2/include/internal/http2_stream.h

@@ -116,9 +116,9 @@ struct tfe_h2_stream
     unsigned int thread_id;
 
     /** for down stream as server */
-    nghttp2_session *as_server;
+    nghttp2_session *http2_server_handle;
     /** for up stream as client*/
-    nghttp2_session *as_client;
+    nghttp2_session *http2_client_handle;
 
     const struct tfe_stream *tf_stream;
 };