- Kubeadm: fix an issue with the kube-proxy container env. variables ([#84888](https://github.com/kubernetes/kubernetes/pull/84888), [@neolit123](https://github.com/neolit123))

This means that now, if you set a value in a context variable before `yield`, the value would still be available after `yield` (as you would intuitively expect). And it also means that you can reset the context variable with a token afterwards.

For example, this works correctly now:

```Python
from contextvars import ContextVar

- HTTP/2 connection health check is enabled by default in all Kubernetes clients. The feature should work out-of-the-box. If needed, users can tune the feature via the HTTP2_READ_IDLE_TIMEOUT_SECONDS and HTTP2_PING_TIMEOUT_SECONDS environment variables. The feature is disabled if HTTP2_READ_IDLE_TIMEOUT_SECONDS is set to 0. ([#95981](https://github.com/kubernetes/kubernetes/pull/95981), [@caesarxuchao](https://github.com/caesarxuchao)) [SIG API Machinery, CLI, Cloud Provider, Cluster Lifecycle,...

- Windows nodes on GCE now have the Windows firewall enabled by default. ([#78507](https://github.com/kubernetes/kubernetes/pull/78507), [@pjh](https://github.com/pjh))
- Added `CNI_VERSION` and `CNI_SHA1` environment variables in `kube-up.sh` to configure CNI versions on GCE. ([#76353](https://github.com/kubernetes/kubernetes/pull/76353), [@Random-Liu](https://github.com/Random-Liu))

              config that was applied, which can be modified by environment variables
              on the kube-controllers process.
            properties:
              environmentVars:
                additionalProperties:
                  type: string
                description: EnvironmentVars contains the environment variables on
                  the kube-controllers that influenced the RunningConfig.

	{XXBLENDVB, 0xfff00000fc000030, 0x500000084000000, 0xfffff00000000, // VSX Vector Blend Variable Byte 8RR:XX4-form (xxblendvb XT,XA,XB,XC)
		[6]*argField{ap_VecSReg_63_63_38_42, ap_VecSReg_61_61_43_47, ap_VecSReg_62_62_48_52, ap_VecSReg_60_60_53_57}},
	{XXBLENDVD, 0xfff00000fc000030, 0x500000084000030, 0xfffff00000000, // VSX Vector Blend Variable Doubleword 8RR:XX4-form (xxblendvd XT,XA,XB,XC)

* `hack/local-up-cluster.sh` now enables the Node authorizer by default. Authorization modes can be overridden with the `AUTHORIZATION_MODE` environment variable, and the `ENABLE_RBAC` environment variable is no longer used. ([#49812](https://github.com/kubernetes/kubernetes/pull/49812), [@liggitt](https://github.com/liggitt))

* Add 'kubectl set env' command for setting environment variables inside containers for resources embedding pod templates ([#50998](https://github.com/kubernetes/kubernetes/pull/50998), [@zjj2wry](https://github.com/zjj2wry))

- Bumped Dashboard version to v1.10.0 ([#68450](https://github.com/kubernetes/kubernetes/pull/68450), [@jeefy](https://github.com/jeefy))
- Added env variables to control CPU requests of kube-controller-manager and kube-scheduler. ([#68823](https://github.com/kubernetes/kubernetes/pull/68823), [@loburm](https://github.com/loburm))

- The `ServiceAccountIssuerDiscovery` feature gate is removed. It reached GA in Kubernetes 1.21. ([#103685](https://github.com/kubernetes/kubernetes/pull/103685), [@mengjiao-liu](https://github.com/mengjiao-liu))
- The `constants/variables` from k8s.io for STABLE metrics is now supported. ([#103654](https://github.com/kubernetes/kubernetes/pull/103654), [@coffeepac](https://github.com/coffeepac))