Log Message:
Update to dhcpcd-6.4.3 with the following changes:

  *  Correct DHCPv6 Prefix Delegation option decoding
  *  Ensure that a given buffer is at least BUFSIZ (for getline compat)
  *  Poll interfaces on BSD for IFF_RUNNING if link state cannot be obtained
  *  Check for an IA to use in DHCPv6 lease validation
  *  Fix compile on NetBSD-6 (and possibly earlier NetBSDs)
  *  Warn about exceeding IDGEN_RETRIES when a stable private address cannot
     be obtained
  *  Fix DHCP option overload handling, thanks to Tobias Stoeckmann