The "--check" option of the "set" command fails with Cloudflare Proxied records

[fgiudici]

Cloudflare Proxied records work using Cloudflare IP addresses for resolving the DNS records and redirecting http and https traffic to the actual value set in the DNS record.
ddflare performs the check of the "--check" flag by resolving the FQDN by regular DNS resolver.
So, when resolving Proxied entries, the check will always fail because the Cloudflare IPs will be retrieved.
Solution is to use the Cloudflare API to check the value of the address directly in Cloudflare configuration.

An alternative could be to detect the IP address as a Cloudflare one (see https://www.cloudflare.com/ips/) and use the Cloudflare API for the check only in that case.