authdes_refresh
if (!authdes_refresh(auth, NULL)) {
ops.ah_refresh = authdes_refresh;
static bool_t authdes_refresh(AUTH *, void *);
if (!authdes_refresh(auth, NULL, CRED()))
ops.ah_refresh = authdes_refresh;
static bool_t authdes_refresh(AUTH *, struct rpc_msg *, cred_t *);