Make this test un-racy.

bin/varnishtest/tests/r01821.vtc

@@ -2,9 +2,13 @@ varnishtest "Slim down hit-for-miss / hit-for-miss objects"
 
 # see also #2768
 
-server s1 -repeat 2 {
+server s1 {
 	rxreq
-	txresp -bodylen 65535
+	expect req.url == "/hfm"
+	txresp -hdr "HFM: True" -bodylen 65530
+	rxreq
+	expect req.url == "/hfp"
+	txresp -hdr "HFP: True" -bodylen 65550
 } -start
 
 varnish v1 -arg "-s Transient=default" -vcl+backend {
@@ -25,16 +29,15 @@ logexpect l1 -v v1 -g raw {
 client c1 {
 	txreq -url "/hfm"
 	rxresp
-} -start
-
-client c2 {
+	expect resp.status == 200
+	expect resp.http.hfm == True
 	txreq -url "/hfp"
 	rxresp
+	expect resp.status == 200
+	expect resp.http.hfp == True
 } -run
 
-client c1 -wait
-
 logexpect l1 -wait
 
 varnish v1 -expect SM?.Transient.c_bytes > 131072
-varnish v1 -expect SM?.Transient.g_bytes < 65536
+varnish v1 -expect SM?.Transient.g_bytes < 2000