List of servers mentions only NGINX and Apache

[philippgille]

The list of servers supporting QUIC mention only NGINX and Apache, but other servers support QUIC already.

• Caddy 0.9 had experimental support and Caddy 2.0 (currently beta) supports QUIC
  • https://github.com/caddyserver/caddy/wiki/QUIC
  • https://caddyserver.com (section "Web Protocols")
• When writing web services in Go, a library can be used to start an HTTP/3 web server: https://github.com/lucas-clemente/quic-go
• Maybe some of the following list count as well: https://en.wikipedia.org/wiki/QUIC#Server_support

Or is there a requirement for production-readyness or popularity (e.g. number of servers on the internet running the server) for it to be listed in the book? That would be a valid point, but then maybe it could be mentioned in the beginning of the section (like "The following servers are production-ready and have an estimated deployment percentage of >1% on the web:" or so).