vdc_eio_unqueue
static void vdc_eio_unqueue(vdc_t *vdc, clock_t deadline,
vdc_eio_unqueue(vdcp, 0, B_FALSE);
vdc_eio_unqueue(vdc, starttime, B_TRUE);
vdc_eio_unqueue(vdc, starttime, B_TRUE);
vdc_eio_unqueue(vdc, 0, B_TRUE);