* When performing a GET then PUT, the kube-apiserver must write the canonical representation of the object to etcd if the current value does not match. That allows external agents to migrate content in etcd from one API version to another, across different storage types, or across varying encryption levels. This fixes a bug introduced...

beta as part of `meta.k8s.io/v1beta1` and configurations must be changed to use the new API.  Clients may request alternate representations of normal Kubernetes objects by passing an `Accept` header like `application/json;as=Table;g=meta.k8s.io;v=v1beta1` or `application/json;as=PartialObjectMetadata;g=meta.k8s.io;v1=v1beta1`.  Older servers will ignore this representation or return an error if it is not available.  Clients may request fallback to the normal object by adding a non-qualified mime-type...

## API Changes

- CRDs get support for x-kubernetes-int-or-string to allow faithful representation of IntOrString types in CustomResources.([#78815](https://github.com/kubernetes/kubernetes/pull/78815), [@sttts](https://github.com/sttts))

- Update Go used to build migrate script in etcd image to v1.16.7. ([#104301](https://github.com/kubernetes/kubernetes/pull/104301), [@serathius](https://github.com/serathius))
- Updated json representation for a conflicted taint to `Key=Effect` when a conflicted taint occurs in kubectl taint. ([#104011](https://github.com/kubernetes/kubernetes/pull/104011), [@manugupt1](https://github.com/manugupt1))

* Added helper funcs to schedulercache.Resource. ([#46926](https://github.com/kubernetes/kubernetes/pull/46926), [@k82cn](https://github.com/k82cn))

* When performing a GET then PUT, the kube-apiserver must write the canonical representation of the object to etcd if the current value does not match. That allows external agents to migrate content in etcd from one API version to another, across different storage types, or across varying encryption levels. This fixes a bug introduced...

     * application/vnd.ms-powerpoint=powerpoint<br>
     * application/vnd.openxmlformats-officedocument.presentationml.presentation=powerpoint<br>
     * application/vnd.oasis.opendocument.text=odt<br>
     * application/vnd.oasis.opendocument.spreadsheet=ods<br>
     * application/vnd.oasis.opendocument.presentation=odp<br>
     * application/pdf=pdf<br>
     * application/x-fictionbook+xml=fb2<br>
     * application/e-pub+zip=epub<br>