iamtrazy

### Verify steps - [X] 我已经在 [Issue Tracker](……/) 中找过我要提出的请求 I have searched on the [issue tracker](……/) for a related feature request. - [X] 我已经仔细看过 [Documentation](https://github.com/Dreamacro/clash/wiki/) 并无法自行解决问题 I have read the...

In Sri lanka the internet cost is very high and people looks into ways to bypass captive portals. In recent cases we found that the first UDP packet less that...