issue #4905 clearer sites example config

[dansgithubuser]

No description provided.

[dansgithubuser]

I was thinking of explaining further the meaning of different parts of the path, but looking at the file I'm realizing meaning is created in a different section. In particular, the folders: config docs, to my mind, establish that code is "the folder containing all your projects, at least in this context. sites: config has to marry up with folders: config, so the meaning flows.

[driesvints]

Thanks but can you send this to 5.7? Otherwise this change won't appear in the current docs.