MAC_FLOW_USER
if (args & MAC_FLOW_USER) {
args &= ~MAC_FLOW_USER;
'u', MDB_OPT_SETBITS, MAC_FLOW_USER, &args,
if (argc > 2 || (argc == 2 && !(args & MAC_FLOW_USER)))
if (args == 0 || args == MAC_FLOW_USER)