Another bugfix: sometimes, very early during execution, a class with namespaces might not be autoloaded yet, and if we are asked to load the old class without namespaces, it will fail. Make it load the file corresponding to the class first, and see if it exists then. If not, try to see if it has been migrated to namespaces, and create the alias then.

Bugfix: don't try to log anything before creating a class alias, as the logger itself might be subject to an alias.

Several updates to the Radius module

No connections to the radius servers are made in these functions.

SimpleSAML namespace usage in config.php

Minor changes to use SimpleSAML namespace to Logger logging level definitions.

Take #2. Use the recently migrated SimpleSAML_Logger::maskErrors() and popErrorMask() methods to simplify code un SimpleSAML\Utils\Config\Metadata.

Move the error-reporting logic in SimpleSAML_Utilities to the SimpleSAML_Logger class, and add a new method there to evaluate whether an error would be masked or not according to its level.

RegistrationInfo can be inherited from EntitiesDescriptor

Expose RegistrationInfo in parsed metadata

- Add test case
- Fix .gitignore since it ignored all metadata folders

Add AttributeValueMap Authentication Processing Filter and unittest.