- Adds the ability to pass --strict-transport-security-directives to the kube-apiserver to set the HSTS header appropriately.  Be sure you understand the consequences to browsers before setting this field. ([#96502](https://github.com/kubernetes/kubernetes/pull/96502), [@249043822](https://...

- Apiserver_storage_transformation_operations_total metric has been updated to include labels transformer_prefix and status. ([#115394](https://github.com/kubernetes/kubernetes/pull/115394), [@ritazh](https://github.com/ritazh)) [SIG API Machinery, Auth, Instrumentation and Testing]

  generate http.Transports for the clients.
  
  - `rest_client_transport_cache_entries` is a gauge metric
  with the number of existing entries in the internal cache
  
  - `rest_client_transport_create_calls_total` is a counter
  that increments each time a new transport is created, storing
  the result of the operation needed to generate it: hit, miss

* Updated priority of mirror pod according to PriorityClassName. ([#58485](https://github.com/kubernetes/kubernetes/pull/58485), [@k82cn](https://github.com/k82cn))
* Fix kubelet to correctly umounts mount points for glusterfs when transport endpoint is not connected and nfs when there is a stale file handle ([#58660](https://github.com/kubernetes/kubernetes/pull/58660), [@humblec](https://github.com/humblec))

- Added `SetTransform` to `SharedInformer` to allow users to transform objects before they are stored. ([#107507](https://github.com/kubernetes/kubernetes/pull/107507), [@alexzielenski](https://github.com/alexzielenski))