Univention Corporate Server 4.0 erratum 161 (bugfix)

This errata update addresses the following issues:
* A reload of apache is now disabled during the complete configuration of a
  UCS appliance. This has been done in order to avoid access problems at the
  end of the wizard when accessing UMC via HTTPS.
* The city search widget has been improved w.r.t. its usability.
* The progress bar has been adjusted to reach 100%, its localization has been
  corrected to match the chosen one, and its output has been improved.
* Output written into /var/log/univention/setup.log is now regularly flushed.
* Fixed wrong URL for advanced UVMM network setup.