FR: Add HTTP/3 support for nginx

[patschi]

Is your feature request related to a problem? Please describe.
The nginx 1.25.0 mainline version introduced experimental HTTP/3 support:
https://mailman.nginx.org/pipermail/nginx-announce/2023/KEVVKRTAXBWBVXA3DIF5SUKRJWZOEMTM.html

Describe the solution you'd like
Implement a setting to be able to enable HTTP/3 for nginx in Froxlor.

Describe alternatives you've considered
n/a

Additional context
n/a

[patschi]

Documentation:
https://nginx.org/en/docs/http/ngx_http_core_module.html#quic
https://nginx.org/en/docs/quic.html

There are several new options available. To enable it, the config can look like:

server {
        listen IP:443 ssl http2;
        listen IP:443 quic reuseport;

        quic_retry on;
        ssl_early_data on;
        [...]
}

[d00p]

even debian 12 only has 1.22.1 in its repositories + its experimental. Hence very low priority