It's nice that these are all defined in one place in the source code in `ckan/new_authz.py` (unfortunately a completely different place from where other config options are defined!), I wonder if these can be done as docstrings and pulled with autodoc?

But in order for them to have docstrings these would have to be defined as attributes rather than dictionary items.

This is the same problem we're discussing in https://github.com/okfn/ckan/pull/693 again of course. We want:

1. All config options defined in one place in the source code, along with their default values, docstrings, and other metadata
2. Use autodoc to pull the docstrings into sphinx
3. Maybe add a test or something to enforce 1.

I'm not sure if we want to hold back all these docs updates for this refactoring, or if we should just put the docs changes through for now and hopefully do the refactoring for 2.1.