[master] 3e7d376f7 vtc: Stabilize r1857

[Dridi Boukelmoune]

commit 3e7d376f7303b0d42d1185f4633f925fec891cb3
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Jun 22 07:41:54 2021 +0200

    vtc: Stabilize r1857
    
    It is possible to see the session close after the second request after
    timeout_linger triggered.

diff --git a/bin/varnishtest/tests/r01857.vtc b/bin/varnishtest/tests/r01857.vtc
index 5686be8fd..6e1256e8e 100644
--- a/bin/varnishtest/tests/r01857.vtc
+++ b/bin/varnishtest/tests/r01857.vtc
@@ -22,7 +22,7 @@ client c1 {
 # Give varnish a chance to update stats
 delay .1
 
-varnish v1 -expect sess_herd == 1
+varnish v1 -expect sess_herd >= 1
 varnish v1 -expect sess_conn == 1
 varnish v1 -expect cache_hit == 1
 varnish v1 -expect cache_miss == 1