Allow specifying proxies per TLD

[CorentinB]

No description provided.

[yzqzss]

Many proxy software (e.g. https://github.com/v2fly/v2ray-core) have routing rule features, so why not just use them?

Those proxy softwares allow you to add multiple proxies and expose one or more http/socks proxy ports on localhost. This makes it easy to route requests.

For example, my routing rules:

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[CorentinB]

Sure, but I think it would be interesting to have it bundled in Zeno