Univention Corporate Server 4.2 erratum 370 (security)

This update addresses the following issue:
* The c-ares function `ares_parse_naptr_reply()`, which is used for parsing
  NAPTR responses, could be triggered to read memory outside of the given
  input buffer if the passed in DNS response packet was crafted in a
  particular way. (CVE-2017-1000381)