Univention Corporate Server 4.2 erratum 574 (extended maintenance)

This update addresses the following issue:
* SQLite encounters an integer overflow (and resultant buffer overflow) for
  FTS3 queries that occur after crafted changes to FTS3 shadow tables,
  allowing remote attackers to execute arbitrary code by leveraging the
  ability to run arbitrary SQL statements (such as in certain WebSQL use
  cases), aka Magellan. (CVE-2018-20346)