Add testcase for #1857
Add testcase for #1857

gquintard/Varnish-Cache,gquintard/Varnish-Cache,varnish/Varnish-Cache,varnish/Varnish-Cache,varnish/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,varnish/Varnish-Cache,feld/Varnish-Cache,varnish/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache