Configuration has been updated so the IDP requests
also pass through an Authorization component.
A new config option was added to choose
which authorization scheme to use for the IDP.
This allows easier reuse of certain reoccurring behaviours,
such as authorization.
The AuthenticatedLdpHandler is no longer required
since it is a combination of parsing and authorization.
This did require a small change to the OperationHandler interface.
Each IDP class using storage now has a different storage.
This way those classes don't have to worry about clashing keys anymore.
All internal storage is now in the /.internal/ container,
thereby making it easier to take the location of the internal data into account:
only 1 path needs to be blocked and a regex router handling internal data
differently only has to match 1 path as well.
