for hitmiss and hitpass, go directly to backend

src/vmod_cluster.c

@@ -472,7 +472,8 @@ decide(VRT_CTX, const struct vmod_cluster_cluster_param *pr,
 
 	if (pr->direct ||
 	    (pr->uncacheable_direct && ctx->bo &&
-	    (ctx->bo->do_pass || ctx->bo->uncacheable)))
+	    (ctx->bo->do_pass || ctx->bo->uncacheable ||
+	     ctx->bo->is_hitmiss || ctx->bo->is_hitpass)))
 		goto real;
 
 	AN(pr->cluster);

src/vmod_cluster.vcc

@@ -41,7 +41,8 @@ roughly equivalent if ``myself`` resolves to the local node
 	}
 
 	sub vcl_backend_fetch {
-		if (bereq.uncacheable || shard.backend() == myself) {
+		if (bereq.uncacheable || bereq.is_hitmiss ||
+		    bereq.is_hitpass || shard.backend() == myself) {
 			set bereq.backend = real.backend();
 		} else {
 			set bereq.backend = shard.backend();