OS X Server 5.1.5 update

Apple has released OS X Server version 5.1.5 update, available from the App Store’s Updates tab. This update require OS X 10.11.5, which was released a few hours before.

There is no information as to what changes this brings, nor – for the moment – any announcement on security updates which it includes. Apple’s release note simply states:
OS X Server v5.1.5 improves the general stability of OS X Server and delivers the following specific improvements:
Updated for OS X El Capitan v10.11.5

There are four small changes to Profile Manager which are noted.

Really, Apple? All you can think to say about over 150 MB of server update is “improves the general stability”? For a server product too? No security information either?