Make the out-of-workspace tests for STRANDS robust for 32-bit.

bin/varnishtest/tests/v00058.vtc

@@ -117,7 +117,6 @@ server s1 {
 	expect req.http.Bar == "bar"
 	expect req.http.Baz == "baz"
 	expect req.http.Quux == "quux"
-	expect req.http.Result == <undef>
 	txresp
 } -start
 
@@ -155,13 +154,13 @@ varnish v1 -vcl+backend {
 client c1 {
 	txreq -url "/1"
 	rxresp
-	expect resp.status == 500
-	expect resp.reason == "Internal Server Error"
+	expect resp.status >= 500
+	expect resp.status <= 503
 } -run
 
 client c1 {
 	txreq -url "/2"
 	rxresp
-	expect resp.status == 503
-	expect resp.reason == "VCL failed"
+	expect resp.status >= 500
+	expect resp.status <= 503
 } -run