Implement the DIOCGSECTORSIZE and DIOCGMEDIASIZE ioctls, and rename

the DIOCGDINFO ioctl into DIOCGDVIRGIN.  This allows the newfs(8) to
work on vinum volumes without the now removed -v option.

Approved by:	grog

sys/dev/vinum/vinumioctl.c

@@ -384,10 +384,18 @@ vinumioctl(dev_t dev,
 	    return EIO;					    /* I/O error */
 
 	switch (cmd) {
-	case DIOCGDINFO:				    /* get disk label */
+	case DIOCGDVIRGIN:				    /* get disk label */
 	    get_volume_label(vol->name, vol->plexes, vol->size, (struct disklabel *) data);
 	    break;
 
+	case DIOCGMEDIASIZE:
+	    *(off_t *)data = vol->size << DEV_BSHIFT;
+	    break;
+
+	case DIOCGSECTORSIZE:
+	    *(u_int *)data = DEV_BSIZE;
+	    break;
+
 	    /*
 	     * We don't have this stuff on hardware,
 	     * so just pretend to do it so that