Univention Corporate Server 4.3 erratum 60 (security)

This update addresses the following issue(s):
* Stack-based buffer overflow in the _nc_write_entry function in
  tinfo/write_entry.c allows attackers to cause a denial of service
  (application crash) or possibly execute arbitrary code via a crafted
  terminfo file, as demonstrated by tic. (CVE-2017-16879)