Univention Corporate Server 4.2 erratum 114 (bugfix)

This update addresses the following issue(s):
* Fix CNAME and PTR record deletion in the S4-Connector.
* Some objects were identified as the wrong object type. The identification
  handling has been fixed.
* It is possible to start the S4 Connector service process in foreground.
* During sync_to_ucs remember entryCSN of msGPO changes to be able to
  identify and skip them later in sync_from_ucs.