This first reverts commit 8e8437da.
Also resolves conflicts with docs on f334fc41
And resolves conflicts with https://github.com/kubernetes/kubernetes/pull/22231/commits
to make people switching between two different methods of setting up by
setting env variables.

Conflicts:
	cluster/get-kube.sh
	cluster/saltbase/salt/README.md
	cluster/saltbase/salt/kube-proxy/default
	cluster/saltbase/salt/top.sls