refactor(http3): use http3 instead of quic

[zll600]

Description

In #10989, I add enable_quic option to config-default.yaml. But enable_quic does not match the mainstream gateway configuration. Both Cloudflare and AWS use enable_http3. So I want to change enable_quic to enable_http3.

For enable HTTP/3 in nginx, we have two steps to do.

1. enable quic in a listen directive for one port.
2. use TLS v1.3
3. enable http3 directive in server/http directive

eg.

    server {
        http3 on;
        listen 8443 quic reuseport;
        listen 8443 ssl;

Here I give two examples

config-defaul.yaml

apsix:
  ssl:
    enable: true
    listen:                                       # APISIX listening port for HTTPS traffic.
      - port: 9443
        enable_http2: true
        enable_http3: false                       # Enable HTTP/3 (with QUIC). If not set default to `false`.
      # - ip: 127.0.0.3                           # If not set, default to `0.0.0.0`.
      #   port: 9445
      #   enable_http2: true
      #   enable_http3: true
    # ssl_trusted_certificate: /path/to/ca-cert   # Set the path to CA certificates used to verify client
                                                  # certificates in the PEM format.
    ssl_protocols: TLSv1.2 TLSv1.3                # TLS versions supported.

exmaple 1: enable http3 for two ports

config.yaml

apisix:
  ssl:
    listen:
      - port: 9443
        enable_http2: true
        enable_http3: true   # access  https://127.0.0.1:9443 with HTTP/3
      - port: 9444
        enable_http2: true
        enable_http3: true   # access https://127.0.0.1:9444 with HTTP/3

generated nginx.conf

    server {
        http2 on;
        http3 on;
        listen 0.0.0.0:9080 default_server reuseport;
        listen [::]:9080 default_server reuseport;
        listen 0.0.0.0:9443 quic default_server reuseport;
        listen 0.0.0.0:9443 ssl default_server;
        listen [::]:9443 quic default_server reuseport;
        listen [::]:9443 ssl default_server;
        listen 0.0.0.0:9444 quic default_server reuseport;
        listen 0.0.0.0:9444 ssl default_server;
        listen [::]:9444 quic default_server reuseport;
        listen [::]:9444 ssl default_server;

        server_name _;

        ssl_certificate      cert/ssl_PLACE_HOLDER.crt;
        ssl_certificate_key  cert/ssl_PLACE_HOLDER.key;
        ssl_session_cache    shared:SSL:20m;
        ssl_session_timeout 10m;

        ssl_protocols TLSv1.2 TLSv1.3;

exmaple2: enable http3 for one port and disable http3 for another port.

config.yaml

apisix:
  ssl:
    listen:
      - port: 9443
        enable_http2: true
        enable_http3: true   # access https://127.0.0.1:9443 with HTTP/3
      - port: 9444
        enable_http2: true
        # enable_http3: true

generated nginx.conf

    server {
        http2 on;
        http3 on;
        listen 0.0.0.0:9080 default_server reuseport;
        listen [::]:9080 default_server reuseport;
        listen 0.0.0.0:9443 quic default_server reuseport;
        listen 0.0.0.0:9443 ssl default_server;
        listen [::]:9443 quic default_server reuseport;
        listen [::]:9443 ssl default_server;
        listen 0.0.0.0:9444 ssl default_server reuseport;
        listen [::]:9444 ssl default_server reuseport;

        server_name _;

        ssl_certificate      cert/ssl_PLACE_HOLDER.crt;
        ssl_certificate_key  cert/ssl_PLACE_HOLDER.key;
        ssl_session_cache    shared:SSL:20m;
        ssl_session_timeout 10m;

        ssl_protocols TLSv1.2 TLSv1.3;

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[shreemaan-abhishek]

Why is this being added now? Why wasn't this added during the main feature PR?

[zll600]

The http3 directive default is on. And I forgot to add it in the main feature PR.#10989