[dnsdist] prometheus values queries-per-connection and connection-duration always 0 for DoH?

[Christoph]

Remi Gacogne via dnsdist wrote:
> These metrics are not yet implemented for DoH, but as they are inherited
> from the generic frontend structure they do appear in our metrics.
> 
> The reason why it was not yet implemented is that the current API of the
> library we are using to handle HTTP/2, h2o, makes that a bit difficult.
> I just implemented [1] an external table to match the connection to DoH
> queries, so we should have these metrics in 1.6.0.
> 
> [1]: https://github.com/PowerDNS/pdns/pull/9738

Thanks for your comprehensive reply and for implementing it, we are
looking forward to running the next release :)

best regards,
Christoph