* API server now has two separate limits for read-only and mutating inflight requests. ([#36064](https://github.com/kubernetes/kubernetes/pull/36064), [@gmarek](https://github.com/gmarek))
* Restored normalization of custom `--etcd-prefix` when `--storage-backend` is set to etcd3 ([#42506](https://github.com/kubernetes/kubernetes/pull/42506), [@liggitt](https://github.com/liggitt))

component-base/logs: that package no longer adds flags to the global flag sets. Commands which want the klog and `--log-flush-frequency` flags must explicitly call `logs.AddFlags`; the new `cli.Run` does that for commands. That helper function also covers flag normalization and printing of usage and errors in a consistent way (print usage text first if parsing failed, then the error). ([#105076](https://github.com/kubernetes/kubernetes/pull/105076), [@pohly](https://github.com/pohly))

### Other (Cleanup...