mlx_foreach
mlx_foreach(controller_print, &verbosity);
mlx_foreach(rescan_ctrlr, NULL);
mlx_foreach(detach_drive, &unit);
mlx_foreach(mlxd_foreach_ctrlr, &ma);
mlx_foreach(mlxd_find_ctrlr_search, NULL);
extern void mlx_foreach(void (*func)(int unit, void *arg), void *arg);