#010971: Retrieval of extra data in ezcAuthentication

- Additional user data in Authentication back-ends like Database, LDAP, OpenId, TypeKey, (ActiveDirectory)
- Out of the scope of pure authentication, would reuse protocol layers.

We discussed implementing a method to retrieve additional user information. The problem with like OpenID is to get this information, otherwise an application has simply no idea on who the user is, only whether it is authenticated. This extra information should only be returned if an option is set.

Operating System:
PHP Version: (please be specific, like '4.4.3' or '5.1.5')
Database and version:
Browser (and version):