making vhost listen to ipv6 also

modoboa_installer/scripts/files/nginx/automx.conf.tpl

@@ -4,6 +4,7 @@ upstream automx {
 
 server {
     listen 80;
+    listen [::]:80;
     server_name %hostname;
 
     access_log /var/log/nginx/%{hostname}-access.log;

modoboa_installer/scripts/files/nginx/modoboa.conf.tpl

@@ -4,12 +4,14 @@ upstream modoboa {
 
 server {
     listen 80;
+    listen [::]:80;
     server_name %hostname;
     rewrite ^ https://$server_name$request_uri? permanent;
 }
 
 server {
     listen 443 ssl;
+    listen [::]:443 ssl;
     server_name %hostname;
     root %app_instance_path;