Support glossary auto-links

[ehuss]

It would be nice to make it easier to link to the glossary.

Ferrocene has ferrocene_autoglossary which gathers the list of terms in the glossary, and then automatically creates links whenever those terms appear in the text. It also checks for glossary terms that are not mentioned anywhere.

I'm uncertain if that is how we want it to work, but seems worth exploring.

[mattheww]

bikeshed might be another source of inspiration. They have the most powerful linking system I've come across in a markdown-based system.

In particular they support reverse links ("referenced in" blocks), which I think can be very useful if you're trying to understand a spec. See here for example.