After changes to Microsoft API, the following settings cannot be set:
access level, entry / exit annoncement, lobby by pass. "On behalf" user
is not usefull anymore. Application ID neither.

And remove Paypal script loading, update Paypal SDK

Keycloak as OAuth/OpenID provider. UI to setup it quickly, more
attributes mapping in olat.local.properties possible

The war file is not complete, it needs the olat.local.properties in
WEB-INF/classes to be deployed

Update hibernate for its memory improvements, spring framework, Bouncy
Castle...