rem: vnode->delete_me = false;
add: vnode->remove = false;
context: unremove_vnode(mount_id mountID, vnode_id vnodeID){	struct vnode *vnode;	mutex_lock(&sVnodeMutex);	vnode = lookup_vnode(mountID, vnodeID);	if (vnode)		vnode->delete_me = false;	mutex_unlock(&sVnodeMutex);	return B_OK;}