krb5-strength To-Do List

 * Update to CrackLib 2, which is currently shipped in Debian.  This
   requires testing to confirm that the on-disk data format is still the
   same.

 * Feed back modifications to CrackLib 2 to allow a program to use a
   custom set of rules, which would allow us to stop embedding our own
   copy of CrackLib customized to add additional rules.

 * Pass the default realm into krb5_appdefault_string when getting
   defaults for the MIT Kerberos plugin.