I'm working on getting HTTP/3 support in place for curl:
https://github.com/gentoo/gentoo/pull/12920

Yes, HTTP/3 isn't final yet. But we're Gentoo - that shouldn't stop us!

My proposal involves:
* A new USE_EXPAND, CURL_HTTP3, with two values: nghttp3 and quiche
* Some arch package.use.mask additions

Which is why I'm contacting the -dev list. And of course also the curl 
maintainer, blueness.

Thoughts?

Thanks,
~Craig