Cannot document dataset configurations

I tried documenting configurations, however that is not possible without having both MASS and EDF properly installed, as it wants to read XLSX files that don't exist.

As you can imagine, this is not going to work on the CI.

We need to figure out a way to enable these databases to be "loaded" w/o necessarily having them installed, or documenting those config modules will be hard.

As of now, I left the documentation in doc/config.bug. If you move that file into doc/config.rst, then include it properly in doc/index.rst, and unset the configuration of EDF/MASS datadirs, you will be able to test what I mean.