Add CloudFlare DNS Servers

Would love to see 1.1.1.1, 1.0.0.1, 2606:4700:4700::1111, and 2606:4700:4700::1111 added as IPv4 and IPv6 servers for CloudFlare.

Details here:

https://1.1.1.1/

and here:

https://www.cloudflare.com/learning/dns/what-is-1.1.1.1/

21

This has already been merged into development.