* Make watch cache treat resourceVersion consistent with uncached watch ([#24008](https://github.com/kubernetes/kubernetes/pull/24008), [@liggitt](https://github.com/liggitt))

### Other notable changes

- Kubeadm: during execution of the "check expiration" command, treat the etcd CA as external if there is a missing etcd CA key file (etcd/ca.key) and perform the proper validation on certificates signed by the etcd CA. Additionally, make sure that the CA for all entries in the output table is included - for both certificates...

		di, err = disk.GetInfo(drivePath, false)

		if !globalIsCICD && !globalIsErasureSD {
			if globalRootDiskThreshold > 0 {
				// Use MINIO_ROOTDISK_THRESHOLD_SIZE to figure out if
				// this disk is a root disk. treat those disks with
				// size less than or equal to the threshold as rootDrives.
				rootDrive = di.Total <= globalRootDiskThreshold
			} else {
				rootDrive, err = disk.IsRootDisk(drivePath, SlashSeparator)
			}
		}

dear!  I'd nearly forgotten that I've got to grow up again!  Let
me see--how IS it to be managed?  I suppose I ought to eat or
drink something or other; but the great question is, what?'

  The great question certainly was, what?  Alice looked all round
her at the flowers and the blades of grass, but she did not see
anything that looked like the right thing to eat or drink under

- Resolves an issue that causes winkernel proxier to treat stale VIPs as valid ([#113567](https://github.com/kubernetes/kubernetes/pull/113567), [@daschott](https://github.com/daschott)) [SIG Network and Windows]

- Kube-proxy: add `--bind-address-hard-fail` flag to treat failure to bind to a port as fatal ([#89350](https://github.com/kubernetes/kubernetes/pull/89350), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle and Network]

	c.Assert(true, bytes.Equal(buffer2.Bytes(), []byte("hello world")))

	// Test the response when object name ends with a slash.
	// This is a special case with size as '0' and object ends with
	// a slash separator, we treat it like a valid operation and
	// return success.
	// The response Etag headers should contain Md5Sum of empty string.
	objectName = "objectwith/"
	// create HTTP request for object upload.

- SSA treats certain structs as atomic ([#100684](https://github.com/kubernetes/kubernetes/pull/100684), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery, Auth, Node and Storage]

- Resolves an issue that causes winkernel proxier to treat stale VIPs as valid ([#113558](https://github.com/kubernetes/kubernetes/pull/113558), [@daschott](https://github.com/daschott)) [SIG Network and Windows]

Without a data validation system, you would have to do all the checks by hand, in code.

These features are what Marshmallow was built to provide. It is a great library, and I have used it a lot before.