Add back VDP_close()s which we could not use before

When subreqs still used the topreq's VDPs, we could not do this, but now
that we properly layer the VDPs again, we can (and should)

src/vdp_pesi.c

@@ -1362,8 +1362,7 @@ fini_subreq(struct req *req, struct node *node)
 		TAKE_OBJ_NOTNULL(boc, &node->subreq.boc, BOC_MAGIC);
 	AZ(node->subreq.oc);
 
-	// XXX NEED Bytes to topreq
-	// VDP_close(node->subreq.req);
+	VDP_close(subreq);
 
 	/* bottom of cnt_transmit() */
 	HSH_Cancel(req->wrk, subreq->objcore, boc);
@@ -2480,8 +2479,7 @@ vped_deliver(struct req *req, struct boc *boc, int wantbody)
 
 		(void)VDP_DeliverObj(req);
 
-		// XXX closes topreq VDPs, TODO
-		// VDP_close(req);
+		VDP_close(req);
 
 		node->final.fi_state = FI_DONE;
 		AZ(pthread_cond_signal(&node->final.fi_cond));