dprinc_test_fail
dprinc_test_fail(user, princ, 0);
dprinc_test_fail("admin", princ, KADM5_UNK_PRINC);
dprinc_test_fail("$admin", princ, KADM5_AUTH_DELETE);
dprinc_test_fail("admin/add", princ, KADM5_AUTH_DELETE);
dprinc_test_fail("admin/modify", princ, KADM5_AUTH_DELETE);
dprinc_test_fail("admin/get", princ, KADM5_AUTH_DELETE);
dprinc_test_fail("admin/none", princ, KADM5_AUTH_DELETE);
dprinc_test_fail(NULL, princ, KADM5_BAD_SERVER_HANDLE);
dprinc_test_fail("admin", NULL, EINVAL);