on work at:
http://blog.xebia.fr/2013/10/10/logs-daudit-pour-les-services-rest/
This requires adding a new Servlet filter to the webapp and specific
loggers in logback configuration

version allowing versioning of policies and PolicySetIdReference as
defined in XACML (id, version patterns)
- New domain properties externalId and rootPolicyRef (root policy
referencing)
- Upgraded the PDP configuration files to the new authzforce-ce-core
version (schema, etc.) using new PAP DAO in authzforce-ce-pap-dao-file
project and its ref policy provider supporting policy set references
with versioning of policies
- Domain IDs and Policy IDs are base64url-encoded
- File tree is organized in the form domainID/policyID/version.$suffix
(e.g. .xml)
- New global conf properties: max number of policies per domain, max
number of versions per domain
- Unit tests for the REST API resources/operations