This change is required for the handler to work with sshtunnels.
Without it, `kubectl exec` and `kubectl port-forward` are broken
when an ssh proxy is used (see #9292). I manually verified this
fixes that issue, e2e test coming shortly.
Makes it possible to access the following subresources:
/namespaces/<ns>/pods/<pod-name>[:port]/proxy
/namespaces/<ns>/pods/<pod-name>/exec?container=<container>&command=<cmd>
/namespaces/<ns>/pods/<pod-name>/portforward
Adds a Log subresource to Pod storage. The Log subresource implements
rest.GetterWithOptions and produces a ResourceStreamer resource that
will stream the log output from the pod's host node.
