Support 1.21.9
[English]
“Using a non-existent port” will cause some mods to crash. Change it to use a randomly generated port, which can be customized in the configuration file.
[中文]
“使用不存在的端口”会导致部分mod崩溃，修改为使用一个随机生成的端口，此端口可在配置文件中自定义。
[English]
Added a message to stop interception after startup is complete.
Fixed an issue where interception did not stop as expected (stopping after the game started, rather than after entering the world).
Changed to use a non-existent port so that the connection fails quickly rather than timing out.
[中文]
增加了启动完成后停止拦截的消息
修复了未按照预期停止拦截的问题（在游戏启动完成后停止，而不是进入世界后）
改为使用不存在的端口，让连接快速失败而不是超时