Implement category and diagnosis-based rule-exception customization

[skeggse]

The linear error scale is somewhat useful for clarifying what you do and don't want to accept in an email address. Unfortunately, you might want to accept some "errors" above your threshold, or reject some below. We should restructure this part of the API to avoid relying on the linear error scale, and instead provide some set of hierarchical options to control this behavior.

[AdriVanHoudt]

As a user you go like

• I have this email that is not validating
• Up the error threshold until it works
• No idea what the threshold means :P

So I'm all for a way to specifically define what is allowed and what not 👍

[hueniverse]

Still happening?

[skeggse]

Yup!