* Allow including custom nginx conf files
Give advanced users more flexibility by allowing them to include custom config files at differents locations in the nginx configuration.
`/data/nginx/custom/root.conf`: Included at the very end of nginx.conf
`/data/nginx/custom/http.conf`: Included at the end of the main `http` block
`/data/nginx/custom/server_proxy.conf`: Included at the end of every proxy `server` block
`/data/nginx/custom/server_redirect.conf`: Included at the end of every redirection `server` block
`/data/nginx/custom/server_stream.conf`: Included at the end of every stream `server` block
`/data/nginx/custom/server_stream_tcp.conf`: Included at the end of every TCP stream `server` block
`/data/nginx/custom/server_stream_udp.conf`: Included at the end of every UDP stream `server` block
* Don't fail if file doesn't exist
* Advanced Nginx settings doc
Since Lets Encrypt don't publish IP ranges that their acme challenge service will be sourced from, we need to allow free access to this location special to override any IP ACLs added by Advanced Custom Nginx Configuration. Due to the way Nginx config is applied, this only applies to the regex and below, keeping the IP ACLs working for the rest of the website.
This reverts commit f9876326c9.
This is to make sure the browser doesn't show a certificate warning (for a connection that will be dropped anyway) by breaking the SSL handshake early.
