Support HTTP/2 Conversion to HTTP/3

[nxenon]

Problem Description

For penetration testers and hackers, there is a need, for converting HTTP/2 traffic to HTTP/3 traffic. Because hackers tools like Burp Suite, does not support H3. So this idea helps hackers to be able to test and hack HTTP/3 websites with proxy tools like Burp Suite.

Proposal

It will be much helpful, if mitmproxy listens for HTTP2 (e.g. 443 TCP) and after getting the request and parsing it, convert it to HTTP/3 server which we have specified using for example --h2-proxy-address 127.0.0.1:443 --up-stream-server h3.website.com:443

Alternatives

Currently I do not have alternate solution for this idea.