try to fix test c05.vtc once and for all

src/tests/c05.vtc

@@ -2,13 +2,9 @@
 
 varnishtest "backref limits"
 
-server s1 {
-	rxreq
-	txresp -hdr "Foo: 123456789012" -body "1111\n"
-} -start
-
-varnish v1 -vcl+backend {
+varnish v1 -vcl {
 	import re2 from "${vmod_topbuild}/src/.libs/libvmod_re2.so";
+	backend b { .host = "${bad_ip}"; }
 
 	sub vcl_init {
 	       new elevendots = re2.regex("(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)");
@@ -16,30 +12,32 @@ varnish v1 -vcl+backend {
     = re2.regex("(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)");
 	}
 
-	sub vcl_backend_response {
-		if (elevendots.match(beresp.http.foo)) {
-			set beresp.http.foo0 = elevendots.backref(0, "error0");
-			set beresp.http.foo1 = elevendots.backref(1, "error1");
-			set beresp.http.foo2 = elevendots.backref(2, "error2");
-			set beresp.http.foo3 = elevendots.backref(3, "error3");
-			set beresp.http.foo4 = elevendots.backref(4, "error4");
-			set beresp.http.foo5 = elevendots.backref(5, "error5");
-			set beresp.http.foo6 = elevendots.backref(6, "error6");
-			set beresp.http.foo7 = elevendots.backref(7, "error7");
-			set beresp.http.foo8 = elevendots.backref(8, "error8");
-			set beresp.http.foo9 = elevendots.backref(9, "error9");
-			set beresp.http.foo10
+	sub vcl_recv {
+		return(synth(200));
+	}
+
+	sub vcl_synth {
+		if (elevendots.match("123456789012")) {
+			set resp.http.foo0 = elevendots.backref(0, "error0");
+			set resp.http.foo1 = elevendots.backref(1, "error1");
+			set resp.http.foo2 = elevendots.backref(2, "error2");
+			set resp.http.foo3 = elevendots.backref(3, "error3");
+			set resp.http.foo4 = elevendots.backref(4, "error4");
+			set resp.http.foo5 = elevendots.backref(5, "error5");
+			set resp.http.foo6 = elevendots.backref(6, "error6");
+			set resp.http.foo7 = elevendots.backref(7, "error7");
+			set resp.http.foo8 = elevendots.backref(8, "error8");
+			set resp.http.foo9 = elevendots.backref(9, "error9");
+			set resp.http.foo10
                         	= elevendots.backref(10, "error10");
-			set beresp.http.foo11
+			set resp.http.foo11
                                 = elevendots.backref(11, "error11");
-			set beresp.http.foo12
+			set resp.http.foo12
                                 = elevendots.backref(12, "fallback");
 		} else {
-			set beresp.status = 999;
+			set resp.status = 999;
 		}
-	}
 
-	sub vcl_deliver {
 		if (twentydots.match("123456789012345678901")) {
 			set resp.http.bar0 = twentydots.backref(0, "error0");
 			set resp.http.bar1 = twentydots.backref(1, "error1");
@@ -112,11 +110,8 @@ client c1 {
 } -run
 
 logexpect l1 -v v1 -d 1 -g vxid -q "VCL_Error" {
-	expect 0 * Begin bereq
-	expect * = VCL_Error "^vmod re2 error: elevendots\.backref\(12, \"fallback\"\): backref out of range \(max 11\)$"
-	expect * = End
-
 	expect 0 * Begin req
+	expect * = VCL_Error "^vmod re2 error: elevendots\.backref\(12, \"fallback\"\): backref out of range \(max 11\)$"
 	expect * = VCL_Error "^vmod re2 error: twentydots\.backref\(21, \"error21\"\): backref out of range \(max 20\)$"
 	expect * = End
 } -run