It's now possible to pass around the `*klog.Logger` which can also be
`nil` to disable logging at all.
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
kubemark's proxy mode exists to test how kube-proxy affects the load
on the apiserver, not how it affects the load on the node. There's no
need to generate fake iptables commands, because that all happens
entirely independently of the api watchers.
