Support of "list of lists"

First of all hello :slight_smile:

PiHole itself runs completely independently. But it is not so easy to keep up to date with the lists.

Therefore I have a script in use which fetches a list of lists from the following link and puts them into piHole.

But it would be extremely helpful if piHole would support such lists. This would reduce the maintenance effort, especially when switching from piHole 4 to piHole 5 (switching to a database).