explain

src/vdp_pesi.c

@@ -1270,6 +1270,7 @@ vped_deliver(struct req *req, struct boc *boc, int wantbody)
 	if (obj_esi) {
 		VSLdbg(req, "vped_deliver: ESI");
 
+		// VDP_pesi has been pushed from VCL
 		VDP_Push(req, &VDP_pesi_buf, pesi);
 		push_vdps(req, vgzgz, gz);
 		AN(parent);