Implement CloudflareError to the http response as a final possibility

[CallocGD]

This seems to happen over proxies but sometimes randomly and since I made an extension this one time that adds proxy support and sometimes I would get the string like error code: XXX even if the response went through as a 200 OK. I thought it would be a smart idea to add this in as an extra safety mechanism incase needed. I have plans to implement another check such as seeing if html pops up (aka. cloudflare IUAM I'm under attack mode) instead of robtop's normal server responses but it may require another parameter in the future incase of false positives so for now this is the best I could do.