From NEWS file:

  [systemd] New class to allow systemd daemon reloads. (adamhl)

  [dns] Changes Livermore detection to use the system's primary IP
  address, instead of using a manually-set parameter. (akkornel)

  [kerberos] Automatically determine if we are in Livermore; if we are,
  place the Livermore-based KDC at the top of the list. (akkornel)

  Clients who are using the base::kerberos::dr class should immediately
  switch to using base::kerberos.  base::kerberos::dr is deprecated.

  [kerberos] Add two parameters to the base::kerberos class. The first
  is used to force the kerberos client to prefer TCP over UDP. The
  second allows one to indicate which kerberos environment to use: prod,
  test, or uat. In both cases, the defaults are such that the krb5.conf
  will continue to have the same contents as before the addition of
  these parameters.