- overridden handlePackage, addPackage, removePackage in respective
entropy.client.interfaces.db classes in a proper, secure way.
- overridden maskFilter in entropy.client.interfaces.db, the final
goal will be removing its logic from EntropyRepository and move
it to AvailablePackagesRepository only.
- removed any evidence of "client_repo" EntropyRepositoryPlugin(s)
metadatum.