version 2.4.28

Fix REST API by letting the SHA-256 key be different for each active interface set
Add example of sha256 key for REST support
Add RestConfiguration and the capacity to restrict usage of a Handler
Add support to check Role in DataModel REST interface
Fix setFromJson to check if value is specified or not
Add check of mandatory value to be set before validating setFromJson
Add cryptoKey configuration in HttpTestRestR66Client
Add capacity to deactivate Signature on REST interface
Add capacity to specify one specific IP for REST interface