Forbid embedded folders.
Forbid embedded folders.

The reason behing that is that a folder containing another can
lead to unexpected behavior.

For example, the following setup would create an infinite loop,
even if some folders are read-only:

A:
  folders:
    foo: /foo
    bar: /foo/bar
B:
  folders:
    foo: /bar/foo
    bar: /bar

onitu/onitu,onitu/onitu,onitu/onitu