White Listing

[sroberts]

There are plenty of values that it would be great to whitelist, especially for domains, emails, and IPv4s.

[sroberts]

Some useful code: https://gist.github.com/sroberts/10c9180e426eee7e2ea9

The best idea is probably to rewrite the list by creating a new one, iterating through the old one, and check if the old items are valid. Trying to remove stuff from the previous one was too hard.