Right now when auth requirements are registered, they need to be registered for the resource path, as well as all vanity paths and potentially all combinations of aliases for that path. First of all, this creates potentially a lot of auth requirements for a single path, but as well requires that the registrar of the auth requirement to be aware of vanity paths and aliases and do the right thing and update the auth requirements whenever there are changes.
We should avoid these additional registrations and processing.
The SlingAuthenticator is currently checking the request path against the auth requirements. We could change this with checking the resolved path. So the authenticator could use a service user resolver and resolve the path and then check the auth requirements.
This avoids all the extra work for the registrar of the auth requirements, but comes with the additional cost of a resolve call per request