r/jellyfin: Restrict HTTPS redirect to Jellyfin

Since Jellyfin is running on the file server, which also hosts a few
other websites that do not define virtual hosts, the HTTP-to-HTTPS
redirect was applied to *all* requests.  To avoid this, we simply add a
rewrite condition so that the redirect only applies to requests for
Jellyfin.

roles/jellyfin/templates/jellyfin.httpd.conf.j2

@@ -3,6 +3,7 @@
 
     RewriteEngine On
     RewriteCond %{HTTPS} !on
+    RewriteCond %{SERVER_NAME} {{ jellyfin_server_name }}
     RewriteRule /.* https://%{SERVER_NAME}$0 [R=301,L]
 </VirtualHost>