New administration APIs include new authentication types and filtering enhancement to packaging APIs.
When configuring an SSL security profile using the adminstration API, there are new authentication types that you can specify.
See Reference: Administration APIs > Client Metadata > Server Configuration > SSLSecurityProfile.
You can filter the retrieval of message-based subscriptions or replication-based subscriptions.
See Reference: Administration APIs > Code Examples > Managing Packages > Retrieval of Filtered Subscriptions.