[RFC] highlight missing parameter classes

**This is not intended to ever actually be pulled**, so I am not including the proper header.

This is just to highlight that several classes that are referenced in the `config/core.xml` file are missing. So I was hoping for an explanation from @drak or @cmfcmf (or anyone that knows)

I discovered this when attempting to look into the problem of https://github.com/zikula/core/issues/1680 *('Disable Site' does not work correctly)*