kadm5_randkey_principal fails. This would most likely
be encountered when one does not have change-password
rights, but uses one of the `--random-key' or `--random-password'
options of the ank command.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11036 ec53bebd-3082-4978-b11e-865c3cabbd6b