Experiment with HTTP/3 using NGINX and quiche

On October 17, 2019, Cloudflare announced the availability of HTTP/3 on their edge network, aiming to improve security and performance on the internet. Users can now enable HTTP/3 on their Cloudflare zone and experiment with it using Chrome Canary or curl. To further promote adoption of QUIC and HTTP/3, Cloudflare has made an implementation of HTTP/3 and QUIC available as a patch to NGINX. This is not officially supported by the NGINX project but aims to help push adoption of these technologies. The integration involves downloading and unpacking the NGINX source code, applying the patch, building NGINX with HTTP/3 support enabled, and configuring it to accept incoming HTTP/3 connections.