* kubeadm: support fetching configuration from the original cluster for 'upgrade diff' ([#80025](https://github.com/kubernetes/kubernetes/pull/80025), [@SataQiu](https://github.com/SataQiu))
* The sample-apiserver gains support for OpenAPI v2 spec serving at `/openapi/v2`. ([#79843](https://github.com/kubernetes/kubernetes/pull/79843), [@sttts](https://github.com/sttts))

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