create_fixed_special
ret = create_fixed_special(context, &rblock, mkey, KRB5_TGS_NAME,
ret = create_fixed_special(context, &rblock, mkey, "kadmin", "admin");
ret = create_fixed_special(context, &rblock, mkey, "kadmin", "changepw");
return create_fixed_special(context, &rblock, mkey, "kadmin", "history");