ssh ProxyCommand 不生效

在 linux 终端，输入是可以的，但在 WindTerm 2.6.1 macOS 版本里设置却不能成功 ssh

### Linux
```
ssh -o "ProxyCommand=/root/cloudflared access ssh --hostname %h/fe1d8b5a31e8a8bbb2a7" root@test.domain.nom.za
```

### WindTerm

Start at WindTerm's macOS SSH ProxyCommand setting and reproduce the reported failure with the cloudflared command shown in the issue. Done means the same ProxyCommand connects successfully in WindTerm as it does from the Linux terminal; the payload names no source files or tests.

Written by the indexing model from the issue text.