Comment 8 for bug 632267

> It's very unlikely that you'll encounter documents which contain U+F001/U+F002.

I agree. I think this supports the idea that we shouldn't be shippings these legacy mappings; they're not being used, they're wrong/broken anyway and carrying them means that we're carrying baggage that isn't of useful relevance (15 years ago, today, or tomorrow).

Hopefully we can sort the canonical (small 'c') mappings out later, but in the meantime could we remove the aliasing of fi and fl into the PUA. I can only see it causing us problems down the line through sustaining bad habits.