优化网络消息处理的睡眠时间，减少CPU占用；扩展连接配置以支持更多参数

steamnet/steam_networking_manager.h

@@ -119,7 +119,7 @@ private:
     std::mutex connectionsMutex;
 
     // Connection config
-    SteamNetworkingConfigValue_t g_connectionConfig[2];
+    SteamNetworkingConfigValue_t g_connectionConfig[3];
     int g_retryCount;
     const int MAX_RETRIES = 3;
     int g_currentVirtualPort;