=over 4
+=item minimum_different
+
+If set to a numeric value, passwords with fewer than this number of unique
+characters will be rejected. This can be used to reject, for example,
+passwords that are long strings of the same character or repetitions of
+small numbers of characters, which may be too easy to guess.
+
=item minimum_length
If set to a numeric value, passwords with fewer than that number of