feat: add dns.ipset_file setting

[hellodword]

just like the upstream_dns_file

[suzukua]

follow ！

need this, dynamic update ipset domain

[ainar-g]

Good day and apologies for the long wait. It's generally better to propose a feature in an issue first, but since it's already done, can I ask, what is the problem you are trying to solve? Is the ipset configuration really getting this large?

[hellodword]

Good day and apologies for the long wait. It's generally better to propose a feature in an issue first, but since it's already done, can I ask, what is the problem you are trying to solve? Is the ipset configuration really getting this large?

For example:

https://github.com/hellodword/GFWList2AGH-ipset/blob/assets/ipset.txt

[ainar-g]

I can see that these are lists of upstreams, correct? How is it related to ipsets?

[hellodword]

I can see that these are lists of upstreams, correct? How is it related to ipsets?

For most usage in my country, upstream_dns_file protects our DNS, ipset define the whitelist or blacklist to pass through the firewall via VPN.

So the ipset often has simliar content and size with the upstream_dns_file.

[hellodword]

For example:

upstream_dns_file:

https://doh.pub:443/dns-query
[/github.com/google.com/]tls://8.8.4.4

ipset:

ipset:
- github.com,google.com/ipset-for-vpn

[ainar-g]

Hm, I see. We'll review the change then.

[ainar-g]

Please also:

1. Merge the current master branch or rebase your branch on top of it, optionally with a squash.

2. Describe the changes in CHANGELOG.md.

[ainar-g]

Thanks for the contribution!