Switch to http2 directive in nginx configs

> 2024/06/02 11:05:53 \[warn\] 30324#30324: the "listen ... http2" directive is deprecated, use the "http2" directive instead

Fixes #589

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

@@ -16,8 +16,9 @@ server {
 }
 
 server {
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ rebuilderd_domain }};
 
     access_log   /var/log/nginx/{{ rebuilderd_domain }}/access.log reduced;

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

@@ -9,8 +9,9 @@ map $uri ${{ redirect.map | hash('md5') }} {
 server {
     listen       80;
     listen       [::]:80;
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ redirect.domain }};
 
     access_log   /var/log/nginx/{{ redirect.domain }}/access.log reduced;

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

 server {
     listen       80;
     listen       [::]:80;
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ repos_rsync_domain }};
     root         /srv/ftp;
 

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

@@ -29,8 +29,9 @@ server {
 }
 
 server {
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ security_tracker_domain }};
 
     access_log   /var/log/nginx/{{ security_tracker_domain }}/access.log reduced;

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

@@ -16,8 +16,9 @@ server {
 }
 
 server {
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ sources_domain }};
 
     access_log   /var/log/nginx/{{ sources_domain }}/access.log reduced;

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

@@ -2,8 +2,9 @@
 server {
     listen       80;
     listen       [::]:80;
-    listen       443 ssl http2;
-    listen       [::]:443 ssl http2;
+    listen       443 ssl;
+    listen       [::]:443 ssl;
+    http2        on;
     server_name  {{ domain }};
     root         /srv/ftp;