The certbot http challenge fails on nginx websites protected by auth_basic (purpose is to protect admin panels, phpmyadmin, etc). I'd like to add `auth_basic off;` to the : [nginx vhost template](https://git.ispconfig.org/ispconfig/ispconfig3/blob/master/server/conf/nginx_vhost.conf.master#L143) I don't see any particular cases where this could be an issue, posting here in case someone identifies one. Thanks in advance for your feedback.