Show HN: Brook v20210701 Released

- [CLI] `$ brook relayoverbrook`

- [CLI] `$ brook servers` removed, please use multiple `$ brook server` instead, joker will be useful, read the document

- [CLI] `$ brook relays` removed, please use multiple `$ brook relay` instead, , joker will be useful, read the document

- [GUI] macOS, optimize tun mode

- [GUI] Windows, optimize compatibility, such as virtual machines

- [GUI] If the server information is added through brook link, the details will not be displayed

https://github.com/txthinking/brook/releases/tag/v20210701