Make sure to reset the workspaces of the backend connection between requests, otherwise we end up filling it up with Content-Length: headers if we manage to keep the backend busy.
Make sure to reset the workspaces of the backend connection between
requests, otherwise we end up filling it up with Content-Length: headers
if we manage to keep the backend busy.

Also make the snapshot of the preferred workspace-size volatile to ensure
that we are consistent.



git-svn-id: 7d4b18ab7d176792635d6a7a77dd8cbbea8e8daa@1584 d4fa192b-c00b-0410-8231-f00ffab90ce4

ssm/pkg-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,wikimedia/operations-debs-varnish,ssm/pkg-varnish,CartoDB/Varnish-Cache,CartoDB/Varnish-Cache