Coredns: DNS-over-HTTPS support in forward plugin

[ghost]

DoH-support in forward plugin: issues like #1929 and #1874. They are all closed but no updates.

Add support for DNS-over-HTTPS described in RFC 8484.

dnscrypt-proxy, cloudflared (see also DNS-over-HTTPS proxy) and Adguard dnsproxy already support this feature.

[miekg]

if done it should be a new plugin, just like the plugin/grpc

[vamage]

Going to work on this. I've created a v0 of this at https://github.com/coredns/coredns/compare/master...vamage:dohtest mostly stealing from grpc plugin.

[snakwu]

Going to work on this. I've created a v0 of this at https://github.com/coredns/coredns/compare/master...vamage:dohtest mostly stealing from grpc plugin.

Can you provide a separate doh plug-in? thank you very much.

[miekg]

closing as this will be done as a new plugin.

[v-byte-cpu]

@miekg why this issue was closed ? This plugin was not merged into mainstream

[miekg]

[ Quoting [e-mail] in "Re: [coredns/coredns] DNS-over-HTTP..." ]

why this issue was closed ? This plugin was not merged into mainstream

https support will need to be done in another plugin, not in forward. Complexity is what
killed the old proxy plugin.

/close
/lock