Support doq-i04 and newer

AdguardTeam / DnsLibs

DNS filtering library that's used in AdGuard products

https://adguard.com/

Apache License 2.0

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Closed sfionov closed 2 years ago

sfionov commented 2 years ago

doq-i04 introduces changes in stream format - includes length field.

Currently we send ALPNs: doq-i02, doq-i00, doq, dq.

We may add doq-i04 - doq-i11 there, but if selected ALPN is doq-i04+, or doq (and port is not 754 and 8853), then switch to new stream format.