Prevent loading multiple VCL's with the same name if the client is not there to stop us.
Prevent loading multiple VCL's with the same name if the client is not
there to stop us.

Fixes #281



git-svn-id: 7d4b18ab7d176792635d6a7a77dd8cbbea8e8daa@3006 d4fa192b-c00b-0410-8231-f00ffab90ce4

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