Merge branch 'nginx-http3' into 'master'

roles/mta_sts/templates/nginx.d.conf.j2

roles/nginx/defaults/main.yml

roles/nginx/tasks/main.yml

roles/nginx/templates/headers.conf

roles/nginx/templates/listen-443.conf.j2

roles/nginx/templates/nginx-hostname-vhost.conf.j2

roles/nginx/templates/nginx.conf.j2

roles/nginx/templates/sslsettings.conf

roles/ping/templates/nginx.d.conf.j2

roles/public_html/templates/nginx.d.conf.j2

roles/rebuilderd/templates/nginx.d.conf.j2

roles/redirects/templates/nginx.d.conf.j2

roles/repo_archive_split_temp/templates/nginx.d.conf.j2

roles/security_tracker/templates/nginx.d.conf.j2

roles/sources/templates/nginx.d.conf.j2

roles/syncrepo/templates/nginx.d.conf.j2