Merge branch 'feat/backup' into nightly

data/conf/nginx/templates/nginx.conf.j2

@@ -150,6 +150,15 @@ http {
         access_log /var/log/nginx/access.log;
         root /dynmaps;
 
+        # backup endpoint of the restic runner: large restore requests, long merges of mailboxes and domains
+        location = /backup.php {
+            client_max_body_size 32m;
+            fastcgi_read_timeout 600s;
+            fastcgi_pass {{ PHPFPMHOST }}:9001;
+            include fastcgi_params;
+            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        }
+
         location ~ \.php$ {
             try_files $uri =404;
             fastcgi_split_path_info ^(.+\.php)(/.+)$;