* Enable setting proxyurl in kubeconfig via kubectl config
This PR enables setting `proxy-url` in kubeconfig via kubectl config.
* Add godoc for proxy-url unit tests
Kubernetes-commit: afdde383210294c3da573decc44b5ce55cffcb94
This reverts commit fc89743dca6b563063b74728c3b28100cf674d9d, reversing
changes made to 29ab38e898988c36e2de34f77fa33be556eb21bd.
Kubernetes-commit: 4ee72eb300423772020dd1cf208159058ba7dab5
Add a new command-line cachedir flag to specify where to store the http
cache responses. This cache will only be used for OpenAPI Swagger spec
for now (as this is the only end-point that returns an ETag).
Kubernetes-commit: d7bba25d4a42f346f1963c86fc0dab43aa4f242e
The usecase of this change:
When a super user grant some RBAC permissions to a group, he can use
--as-group to test whether the group get the permissions.
Note that now we support as-groups, as-user-extra in kubeconfig file
after this change.
Kubernetes-commit: e541defd49d01024d17dddf8e966eba2c46a6db0
