- 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

* 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))

- Rename unschedulableQ to unschedulablePods ([#108919](https://github.com/kubernetes/kubernetes/pull/108919), [@denkensk](https://github.com/denkensk))
- SPDY transport in client-go will no longer follow redirects. ([#108531](https://github.com/kubernetes/kubernetes/pull/108531), [@tallclair](https://github.com/tallclair))