- functions not related to user management now have the existence of the affected user checked in the authorizer, when the affected user differs from the actor
- User::authorizationEnabled() now nests: disabling twice and then enabling once leaves the authorizer disabled
- Disabling of the authorizer is now tested
- User tests now use a partial mock instead of relying on User::authorizationEnabled()
- Added authorizer tests against a missing user
- Removed folder tests related to missing users
- Also added more subscription tests
