the distroprefs "Filenames" chapter documenting "File path" and "Activating the feature" was a frustrating surprise

[wchristian]

An offhanded comment somewhere else gave me a distroprefs file and i was looking with no previous for knowledge for how to install the file and skimmed all the chapters below the first one mentioning it, before realizing that the Filenames chapter explains that. Please split that out and give it a better title.