* fix typo  ([#59619](https://github.com/kubernetes/kubernetes/pull/59619), [@jianliao82](https://github.com/jianliao82))
    * incase -> in case
    * selction -> selection
* Implement envelope service with gRPC, so that KMS providers can be pulled out from API server. ([#55684](https://github.com/kubernetes/kubernetes/pull/55684), [@wu-qiang](https://github.com/wu-qiang))

* Use separate client for leader election in scheduler to avoid starving leader election by regular scheduler operations. ([#53793](https://github.com/kubernetes/kubernetes/pull/53793), [@wojtek-t](https://github.com/wojtek-t))

### API Change

- Kubernetes components that perform leader election now only support using `Leases` for this. ([#114055](https://github.com/kubernetes/kubernetes/pull/114055), [@aimuz](https://github.com/aimuz))

* Deployment will stop adding pod-template-hash labels/selector to ReplicaSets and Pods it adopts. Resources created by Deployments are not affected (will still have pod-template-hash labels/selector).  ([#61615](https://github.com/kubernetes/kubernetes/pull/61615), [@janetkuo](https://github.com/janetkuo))

* apply: fix detection of non-dry-run enabled servers ([#71854](https://github.com/kubernetes/kubernetes/pull/71854), [@apelisse](https://github.com/apelisse))
* Scheduler only activates unschedulable pods if node's scheduling related properties change. ([#71551](https://github.com/kubernetes/kubernetes/pull/71551), [@mlmhl](https://github.com/mlmhl))

- GCE: Fixes loadbalancer creation and deletion issues appearing in 1.10.5. ([#66400](https://github.com/kubernetes/kubernetes/pull/66400), [@nicksardo](https://github.com/nicksardo))
- Fixed exception detection in fluentd-gcp plugin. ([#65361](https://github.com/kubernetes/kubernetes/pull/65361), [@xperimental](https://github.com/xperimental))

 - For all kinds in the API group version, a spec.selector default value is no longer
 available, because it's incompatible with `kubectl
 apply` and strategic merge patch. You must explicitly set the spec.selector value
 in your manifest. An object with a spec.selector value that does not match the labels in
 its spec.template is invalid.

 - Selector mutation is disabled for all kinds in the

-->
```release-note

```

#### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

<!--
This section can be blank if this pull request does not require a release note.

When adding links which point to resources within git repositories, like
KEPs or supporting documentation, please reference a specific commit and avoid

3. Grant of Patent License. Subject to the terms and conditions of this 
License, each Contributor hereby grants to You a perpetual, worldwide, 
non-exclusive, no-charge, royalty-free, irrevocable (except as stated in 
this section) patent license to make, have made, use, offer to sell, sell, 
import, and otherwise transfer the Work, where such license applies only to 
those patent claims licensable by such Contributor that are necessarily