- IPv6 listen statement will listen on both IPv4 and IPv6 by default (and will...

- IPv6 listen statement will listen on both IPv4 and IPv6 by default (and will prevent the [emerg] bind() to [::]:80 failed (98: Address already in use) error).

templates/nginx/sites-enabled/stub_status

 server {
-    listen 80;
     listen [::]:80;
     server_name stub_status;
     {{ "stub_status" if nginx["version"]|version_compare("1.7.5", ">") else "stub_status on" }};