* Recognize eu-west-2 region ([#38746](https://github.com/kubernetes/kubernetes/pull/38746), [@justinsb](https://github.com/justinsb))
* Recognize ca-central-1 region ([#38410](https://github.com/kubernetes/kubernetes/pull/38410), [@justinsb](https://github.com/justinsb))

- For kube-up and derived configurations, CoreDNS will honor master taints, for consistency with kube-dns behavior. ([#70868](https://github.com/kubernetes/kubernetes/pull/70868), [@justinsb](https://github.com/justinsb))
- Recognize newer docker versions without -ce/-ee suffix: 18.09.0 ([#71001](https://github.com/kubernetes/kubernetes/pull/71001), [@thomas-riccardi](https://github.com/thomas-riccardi))

- `kubectl prune v2`: Switched annotation from `contains-group-resources` to `contains-group-kinds`,
  because this is what we defined in the KEP and is clearer to end-users. Although the functionality is
  in `alpha`, we will recognize the prior annotation. This migration support will be removed in `beta`/`GA`. ([#118942](https://github.com/kubernetes/kubernetes/pull/118942), [@justinsb](https://github.com/justinsb))

* Enable customize in kubectl: kubectl will be able to recognize directories with kustomization.YAML ([#70875](https://github.com/kubernetes/kubernetes/pull/70875), [@Liujingfang1](https://github.com/Liujingfang1))

* During namespace deletion some controllers create event and log spam because they do not recognize namespace deletion as a terminal state. ([#84123](https://github.com/kubernetes/kubernetes/pull/84123), [@smarterclayton](https://github.com/smarterclayton))

  * PodSecurityPolicy now recognizes pods that specify runAsNonRoot: false in their security context and does not overwrite the specified value ([#47073](https://github.com/kubernetes/kubernetes/pull/47073), [@Q-Lee](https://github.com/Q-Lee))

* New conformance tests added for the Garbage Collector ([#60116](https://github.com/kubernetes/kubernetes/pull/60116), [@jennybuckley](https://github.com/jennybuckley))

* Fixes a bug where character devices are not recognized by the kubelet ([#60440](https://github.com/kubernetes/kubernetes/pull/60440), [@andrewsykim](https://github.com/andrewsykim))

- The kubelet recognizes the --containerd-namespace flag to configure the namespace used by cadvisor. ([#87054](https://github.com/kubernetes/kubernetes/pull/87054), [@changyaowei](https://github.com/changyaowei)) [SIG Node]

- Kube-apiserver: multiple comma-separated protocols in a single X-Stream-Protocol-Version header are now recognized, in addition to multiple headers, complying with RFC2616 ([#89857](https://github.com/kubernetes/kubernetes/pull/89857), [@tedyu](https://github.com/tedyu)) [SIG API Machinery]

* PodSecurityPolicy now recognizes pods that specify `runAsNonRoot: false` in their security context and does not overwrite the specified value ([#47073](https://github.com/kubernetes/kubernetes/pull/47073), [@Q-Lee](https://github.com/Q-Lee))