because we don't flush in _fini, we need to always flush...

src/foreign/cache_esi_deliver.c

@@ -171,6 +171,15 @@ vped_gzgz_init(struct req *req, void **priv)
 	return (0);
 }
 
+/*
+ * we removed a NULL VDP_FLUSH from _fini because in our code it goes to the
+ * _toparent vdp on the same request, rather than one request up as in the
+ * original code.
+ *
+ * thus our VDP_bytes all have to flush
+ *
+ * XXX revisit maybe...
+ */
 static int v_matchproto_(vdp_bytes_f)
 vped_gzgz_bytes(struct req *req, enum vdp_action act, void **priv,
     const void *ptr, ssize_t len)
@@ -211,7 +220,7 @@ vped_gzgz_bytes(struct req *req, enum vdp_action act, void **priv,
 		/* Remove the "LAST" bit */
 		foo->dbits[0] = *pp;
 		foo->dbits[0] &= ~(1U << (foo->last & 7));
-		if (VDP_bytes(req, act, foo->dbits, 1))
+		if (VDP_bytes(req, VDP_FLUSH, foo->dbits, 1))
 			return (-1);
 		foo->ll++;
 		len--;
@@ -285,7 +294,7 @@ vped_gzgz_bytes(struct req *req, enum vdp_action act, void **priv,
 		default:
 			WRONG("compiler must be broken");
 		}
-		if (VDP_bytes(req, act, foo->dbits + 1, foo->lpad))
+		if (VDP_bytes(req, VDP_FLUSH, foo->dbits + 1, foo->lpad))
 			return (-1);
 	}
 	if (len > 0) {