* Fix a bug where container cannot run as root when SecurityContext.RunAsNonRoot is false. ([#47009](https://github.com/kubernetes/kubernetes/pull/47009), [@yujuhong](https://github.com/yujuhong))

- The `SecurityContextDeny` admission plugin is going deprecated and will be removed in...

  hostPath: "{cloud-config-path}"
  mountPath: "{cloud-config-path}"
```
* If you need to use the `.PrivilegedPods` functionality, you can still edit the manifests in `/etc/kubernetes/manifests/`, and set `.SecurityContext.Privileged=true` for the apiserver and controller manager.
 ([#63866](https://github.com/kubernetes/kubernetes/pull/63866), [@luxas](https://github.com/luxas))

- ProcMount has been added to SecurityContext and AllowedProcMounts has been added to PodSecurityPolicy to allow paths in the container's /proc to not be masked. ([#64283](https://github.com/kubernetes/kubernetes/pull/64283), [@jessfraz](https://github.com/jessfraz)) Courtesy of SIG API Machinery,...

Technically this means that a first class `seccompProfile` field has been added to the Pod and Container `securityContext` objects:

```yaml
securityContext:
  seccompProfile:
    type: RuntimeDefault|Localhost|Unconfined # choose one of the three
    localhostProfile: my-profiles/profile-allow.json # only necessary if type == Localhost
```

- Pass additional flags to subpath mount to avoid flakes in certain conditions. ([#104253](https://github.com/kubernetes/kubernetes/pull/104253), [@mauriciopoppe](https://github.com/mauriciopoppe))

- The alpha feature `ConfigurableFSGroupPolicy` enables v1 Pods to specify a spec.securityContext.fsGroupChangePolicy policy to control how file permissions are applied to volumes mounted into the pod. ([#88488](https://github.com/kubernetes/kubernetes/pull/88488), [@gnufied](https://github.com/gnufied)) [SIG  Storage]

* Fix the bug where container cannot run as root when SecurityContext.RunAsNonRoot is false. ([#47009](https://github.com/kubernetes/kubernetes/pull/47009), [@yujuhong](https://github.com/yujuhong))

* add gzip compression to GET and LIST requests ([#45666](https://github.com/kubernetes/kubernetes/pull/45666), [@ilackarms](https://github.com/ilackarms))
* Fix the bug where container cannot run as root when SecurityContext.RunAsNonRoot is false. ([#47009](https://github.com/kubernetes/kubernetes/pull/47009), [@yujuhong](https://github.com/yujuhong))

    * Kubernetes v1.16, and is only honored by servers that enable the PodOverhead feature.gate.
* N/A ([#80260](https://github.com/kubernetes/kubernetes/pull/80260), [@khenidak](https://github.com/khenidak))
* Add v1.Container.SecurityContext.WindowsOptions.RunAsUserName to the pod spec  ([#79489](https://github.com/kubernetes/kubernetes/pull/79489), [@bclau](https://github.com/bclau))