[Feature] Improved way of updating Cloudflare addreseses

[plutocrat]

Describe the feature or change in detail

Noticed your method of keeping Cloudflare addreses is hard coded into the upgrade script.
Perhaps consider this method
https://github.com/ergin/nginx-cloudflare-real-ip
This is a bash script that gets the IPs live and puts them into a file.
Then all you'd need to do is 'include' the file into nginx.conf.

You could run the bash command either on upgrade, or with a cron job, say monthly.

Would you like to sponsor this feature to have it implemented?

No

[jaapmarcus]

It makes sense to do it such way it shouldn't take a lot of time to implement it

[jakobbouchard]

Will be closed by #3338.