* Fix incorrect conflict errors applying strategic merge patches to resources. ([#43871](https://github.com/kubernetes/kubernetes/pull/43871), [@liggitt](https://github.com/liggitt))
* Fixed an issue mounting the wrong secret into pods as a service account token. ([#44102](https://github.com/kubernetes/kubernetes/pull/44102), [@ncdc](https://github.com/ncdc))

- Kubelet now cleans up orphaned volume directories automatically ([#95301](https://github.com/kubernetes/kubernetes/pull/95301), [@lorenz](https://github.com/lorenz)) [SIG Node and Storage]
- Resolves spurious `Failed to list *v1.Secret` or `Failed to list *v1.ConfigMap` messages in kubelet logs. ([#99538](https://github.com/kubernetes/kubernetes/pull/99538), [@liggitt](https://github.com/liggitt)) [SIG Auth and Node]

}

// CopyObjectHandler - Copy Object
// ----------
// This implementation of the PUT operation adds an object to a bucket
// while reading the object from another source.
// Notice: The S3 client can send secret keys in headers for encryption related jobs,
// the handler should ensure to remove these keys before sending them to the object layer.
// Currently these keys are:
//   - X-Amz-Server-Side-Encryption-Customer-Key

    String APP_DIGEST_ALGORITHM = "app.digest.algorithm";

    /** The key of the configuration. e.g. .*password|.*key|.*token|.*secret */
    String APP_ENCRYPT_PROPERTY_PATTERN = "app.encrypt.property.pattern";

    /** The key of the configuration. e.g. .*password.*|.*secret.*|.*key.*|.*token.*|.*credential.*|.*auth.*|.*private.* */
    String APP_LOG_SENSITIVE_PROPERTY_PATTERN = "app.log.sensitive.property.pattern";

### Immutable Secrets and ConfigMaps (beta)

Secret and ConfigMap volumes can be marked as immutable, which significantly reduces load on the API server if there are many Secret and ConfigMap volumes in the cluster.
See [ConfigMap](https://kubernetes.io/docs/concepts/configuration/configmap/) and [Secret](https://kubernetes.io/docs/concepts/configuration/secret/) for more information.

### CSI Proxy for Windows

- Added a show-secret flag to the diff command to explicitly allow secret values to be displayed during the diff operation. ([#137019](https://github.com/kubernetes/kubernetes/pull/137019), [@olamilekan000](https://github.com/olamilekan000)) [SIG CLI]

- The helping message of commands which have sub-commands is now clearer and more instructive. It will show the full command instead of `kubectl <command> --help ...`
  
  Changed `kubectl create secret --help` description. There will be a short introduction to the three secret types and clearer guidance on how to use the command. ([#117930](https://github.com/kubernetes/kubernetes/pull/117930), [@LronDC](https://github.com/LronDC))

- Fixed in-tree to CSI migration for Portworx volumes, in clusters where Portworx security feature is enabled (it's a Portworx feature, not Kubernetes feature). It required secret data from the secret mentioned in-tree SC, to be passed in CSI requests which was not happening before this fix. ([#129675](https://github.com/kubernetes/kubernetes/pull/129675), [@gohilankit](https://github.com/gohilankit)) [SIG Storage]

- Kubelet now cleans up orphaned volume directories automatically ([#95301](https://github.com/kubernetes/kubernetes/pull/95301), [@lorenz](https://github.com/lorenz)) [SIG Node and Storage]
- Resolves spurious `Failed to list *v1.Secret` or `Failed to list *v1.ConfigMap` messages in kubelet logs. ([#99538](https://github.com/kubernetes/kubernetes/pull/99538), [@liggitt](https://github.com/liggitt)) [SIG Auth and Node]
- Sync node status during kubelet node shutdown.

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))