Univention Corporate Server 4.2 erratum 429 (bugfix)

This update addresses the following issue(s):
* A problem with the saml authentication which could lead to the
  UMC web interface becoming unresponsive has been fixed.
* In certain situations after reloading the browser window the error message
  "There are no modules available for the currently authenticated user" was
  incorrectly displayed. This behavior has been repaired.