nginx: disable http/3

quictls is unmaintained for 5 months now

modules/core/nginx.nix

@@ -7,14 +7,10 @@
         ({ name, ... }: {
           enableACME = true;
           forceSSL = true;
-          # enable http3 for all hosts
-          quic = true;
-          http3 = true;
           # split up nginx access logs per vhost
           extraConfig = ''
             access_log /var/log/nginx/${name}_access.log;
             error_log /var/log/nginx/${name}_error.log;
-            add_header Alt-Svc 'h3=":443"; ma=86400';
           '';
         })
       );