Post this PR, when users supply 0 for CacheSize this will result in a validation error.
   2. CacheSize type was changed from int32 to *int32. This allows defaulting logic to differentiate between cases where users explicitly supplied 0 vs. not supplied any value.
   3. KMS Provider's endpoint (path to Unix socket) is now validated when the EncryptionConfiguration files is loaded. This used to be handled by the GRPCService.

### Other notable changes

    - [Deployments](#deployments)
    - [kubectl rolling-update: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-rolling-update--v140-client-vs-v140-cluster)
    - [kubectl delete: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-delete--v140-client-vs-v140-cluster)
    - [DELETE operation in REST API](#delete-operation-in-rest-api)
  - [Action Required Before Upgrading](#action-required-before-upgrading)

testing for runtime failures and now perform a more rigorous reconciliation to ensure static pods (especially those that use fixed UIDs) are restarted.  As a side effect of these changes static pods will be restarted with lower latency than before (2s vs 4s, on average) and rapid updates to pod configuration should take effect sooner.
  
  A new metric `kubelet_known_pods` has been added at ALPHA stability to report the number of pods a Kubelet is tracking in a number of internal states....

- Fixed dry-run output in kubectl apply --prune ([#69344](https://github.com/kubernetes/kubernetes/pull/69344), [@zegl](https://github.com/zegl))
- The kubectl wait command must handle when a watch returns an error vs closing by printing out the error and retrying the watch. ([#69389](https://github.com/kubernetes/kubernetes/pull/69389), [@smarterclayton](https://github.com/smarterclayton))

- Added a "reason" field to the "image_garbage_collected_total" metric, allowing administrators to differentiate between images that were collected for reasons "age" vs "space".
   ([#123345](https://github.com/kubernetes/kubernetes/pull/123345), [@haircommander](https://github.com/haircommander))

* Fix bug with service nodeports that have no backends not being rejected, when they should be.  This is not a regression vs v1.5 - it's a fix that didn't quite fix hard enough. ([#43972](https://github.com/kubernetes/kubernetes/pull/43972), [@thockin](https://github.com/thockin))

  - `priority_level_request_count_watermarks` is removed.
  - `read_vs_write_request_count_samples` is replaced with `read_vs_write_current_requests`, which samples every nanosecond rather than every second; the new metric, like the old one, measures utilization when the max-in-flight filter is used and number of requests when the API Priority and Fairness filter is used.

    * Date:           Nov 03, 2016
    * Kernel:         ChromiumOS-4.4
    * Kubernetes:     v1.4.5
    * Docker:         v1.11.2
    * Changelog (vs 55-8872-18-0)
            * Updated kubernetes to v1.4.5