Univention Corporate Server 4.3 erratum 640 (extended maintenance)

This update addresses the following issue:
* In array_find of array.c, there is a possible out-of-bounds read due to an
  incorrect bounds check. This could lead to local information disclosure in
  the printer spooler with no additional execution privileges needed. User
  interaction is not needed for exploitation. (CVE-2019-2228)