Update to use go1.11.2

Add dns capabilities for Windows CNI plugins

Remove subPath tests from host_path.go 

Move volume scheduling feature to GA

kubeadm: make sure that commands are not added for hidden phases

periodically reload tokens read from TokenFile in kubeconfig

Update to rules_go 0.16.2 and gazelle 0.15.0

delete some para no need used in local volume

fix local volume getVolumeSourceFSType func by golint

Fix typos

updates audit endpoints test

Replace resyncTicker with syncTicker in comment

fix a bug that --tail option does not take effects in 'kubectl logs --selector xx=xx --tail 3'

cmd/kube-controller-manager: add myself as owner

remove webhook cache implementation and replace with token cache

Use versioned loopbacke connection in master endpoint reconciliation

Remove unused function in downwardapi.go

Modify and update the comments

Validate kubeconfig files in case of external CA mode

As discussing on #68905
some tests of test/e2e/common/host_path.go are covered with
test/e2e/storage/testsuites/subpath.go
So we don't need to keep them in test/e2e/common/host_path.go
anymore for the maintenance.

The striped cache used by the token cache is slightly more sophisticated
however the simple cache provides about the same exact behavior. I used
the striped cache rather than the simple cache because:

* It has been used without issue as the primary token cache.
* It preforms better under load.
* It is already exposed in the public API of the token cache package.

remove duplicate default value in `kubelet --help`

Fix a wrong judgement in elasticsearch_logging_discovery.go

fix typo Kubernets to Kubernetes

fix typo in comment

Use `audit.k8s.io/v1` as default value of option --audit-webhook-vers…

fix golint errors in pkg/volume/*

cleanup pkg/apis/core/types.go

kubeadm: Perform IPVS check on join only if the cluster was set up with IPVS

Like we do with InClusterConfig.

git ignore vendordiff.patch to avoid accidental checkin

combine similar code where calucate schedule priority

Add CRDs to etcd storage path test

kubeadm: Add configurable control plane up timeout

Fix some golint errors for packages in `pkg/kubectl`