adjust to fixed accounting in varnish master
Ref: https://github.com/varnishcache/varnish-cache/pull/2558 varnish-cache commit 51176640603b123a38b49ae271cb9c9de9df1d28
.gitlab-ci.yml not found in this commit
Ref: https://github.com/varnishcache/varnish-cache/pull/2558 varnish-cache commit 51176640603b123a38b49ae271cb9c9de9df1d28