完成HTTP请求侧解析调试，可以解析请求的URL。

* 增加插件管理功能（简单实现），可以调用解析层插件；
* 调整HTTP请求侧解析回调函数实现；
* 增加hexdump工具函数；

platform/include/internal/platform.h

@@ -74,13 +74,16 @@ struct tfe_stream_private
 	int calling_idx;
 
 	size_t forward_bytes;
-	size_t defere_bytes;
 	size_t drop_bytes;
 
-	enum tfe_app_proto app_proto;
-	int plugin_num;
+	size_t defer_bytes;
+	struct timeval defer_timeval;
 
-	struct plugin_ctx * plug_ctx;
+	enum tfe_app_proto app_proto;
+
+	/* Plugin Ctxs */
+	unsigned int nr_plugin_ctxs;
+	struct plugin_ctx * plugin_ctxs;
 
 	/* TCP forward without scan or decode when the passthough is set */
 	bool passthough;