Replace acme.vhost on Nginx ISPC installations by snippet

Acme.vhost makes it impossible to score 100% on internet.nl because it handles the servername over port 80 only in Nginx thus outside of the default website which will handle the servername over port 443. And when you create a website for the servername in ISPC it will result in warnings in Nginx about a duplicate servername.

LE authentication can be done far better with a snippet in Nginx to create a sort of alias construction like in Apache. This snippet can also be used in /usr/local/ispconfig/server/conf/nginx_vhost.conf.master to replace all acme-challenge locations.

See this forum thread for my solution to this.