SSL/TLS: Break down failure types

[DanielOaks]

Honestly, we could probably even just look at storing the direct failure messages that Go throws back at us if we can't get any more specific info. In the grab files at least, and then parsing them into the nice failure type names when we export the data files.

[DanielOaks]

We've started doing this with new data, but the way we test for and break it down in the backend is somewhat dodgy and could definitely be improved.