Read Client info from NextDNS CLI

[coltonshipley]

Prerequisites

• [X] I have checked the Wiki and Discussions and found no answer

• [X] I have searched other issues and found no duplicates

• [X] I want to request a feature or enhancement and not ask a question

Description

What problem are you trying to solve?

When using AGH as the upstream DoH in the NextDNS CLI The client name isn't parsed. Client info is passed from NextDNS CLI in the header. See here - https://github.com/nextdns/nextdns/blob/master/resolver/doh.go#L97

Proposed solution

Allow options in AGH to pull this client info from these header fields.

Alternatives considered

There seems to be no other good way to do this and NextDNS CLI is supported on many devices. (I'm using on my UDM Pro as the DoH proxy and setting AGH up to receive/answer all requests)

Additional information

[felipejfc]

I tried to give this one a go but NextDNS is not sending the headers in my tests. My setup is I have it installed with -setup-router, -report-client-info and forwarding to adguard on my UDM PRO and only headers I see arriving are

    req.Header.Set("Content-Type", "application/dns-message")
    req.Header.Set("X-Conf-Last-Modified", "true")