[RFE] upstream_selector option for doh-server

[brotaxt]

Hey guys,

the title says it all. At the moment a random upstream server will be chosen if we specify multiple IPs.

What do you think about the idea to be able to change the upstream_selector for the doh-server like its already possible in the doh-client configuration?

Best regards
brotaxt

[m13253]

I like this idea.

But currently I am busy with other software projects, so I need to find a good day to come back and add this feature.

Meanwhile, PRs are welcome!