- api-machinery utility functions `SetTransportDefaults` and `DialerFor` once again respect custom Dial functions set on transports ([#65547](https://github.com/kubernetes/kubernetes/pull/65547), [@liggitt](https://github.com/liggitt))

- Fixed a bug in client-go where new clients with customized `Dial`, `Proxy`, `GetCert` config may get stale HTTP transports. ([#95427](https://github.com/kubernetes/kubernetes/pull/95427), [@roycaihw](https://github.com/roycaihw)) [SIG API Machinery]

- Fixed a bug in client-go where new clients with customized `Dial`, `Proxy`, `GetCert` config may get stale HTTP transports. ([#95427](https://github.com/kubernetes/kubernetes/pull/95427), [@roycaihw](https://github.com/roycaihw)) [SIG API Machinery]

- Client-go uses the same HTTP client for all the generated groups and versions, allowing to share customized transports for multiple groups versions. ([#105490](https://github.com/kubernetes/kubernetes/pull/105490), [@aojea](https://github.com/aojea))

- Client-go now exposes two new metrics to monitor the client-go logic that
  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

- Fixed a bug in client-go where new clients with customized `Dial`, `Proxy`, `GetCert` config may get stale HTTP transports. ([#95427](https://github.com/kubernetes/kubernetes/pull/95427), [@roycaihw](https://github.com/roycaihw)) [SIG API Machinery]

- proxy/transport now supports Content-Encoding: deflate ([#76551](https://github.com/kubernetes/kubernetes/pull/76551), [@JieJhih](https://github.com/JieJhih))

- 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://...

([#62695](https://github.com/kubernetes/kubernetes/pull/62695), [@CaoShuFeng](https://github.com/CaoShuFeng))

*   The canonical pronunciation of kubectl is "cube control".
*   Added --raw to kubectl create to POST using the normal transport. ([#54245](https://github.com/kubernetes/kubernetes/pull/54245),[ @deads2k](https://github.com/deads2k))