* Fix handling tombstones in pod-disruption-budged controller. ([#83951](https://github.com/kubernetes/kubernetes/pull/83951), [@zouyee](https://github.com/zouyee))

## Changelog since v1.18.3

## Changes by Kind

### API Change

- Resolve regression in metadata.managedFields handling in update/patch requests submitted by older API clients ([#92007](https://github.com/kubernetes/kubernetes/pull/92007), [@apelisse](https://github.com/apelisse)) [SIG API Machinery and Testing]

### Feature

## Changelog since v1.21.11

## Changes by Kind

### Bug or Regression

- Fixes error handling in a kubectl method used in downstream packages. ([#108521](https://github.com/kubernetes/kubernetes/pull/108521), [@heybronson](https://github.com/heybronson)) [SIG CLI]

- Fixed an issue with stuck connections handling error responses ([#71412](https://github.com/kubernetes/kubernetes/pull/71412), [@liggitt](https://github.com/liggitt))
- apiserver: fixed handling and logging of panics in REST handlers ([#71076](https://github.com/kubernetes/kubernetes/pull/71076), [@liggitt](https://github.com/liggitt))

- Fixes calculating the requeue time in the cronjob controller, which results in properly handling failed/stuck jobs ([#121327](https://github.com/kubernetes/kubernetes/pull/121327), [@soltysh](https://github.com/soltysh)) [SIG Apps]

- Fixes a panic in kube-controller-manager handling StatefulSet objects when revisionHistoryLimit is negative ([#129325](https://github.com/kubernetes/kubernetes/pull/129325), [@ardaguclu](https://github.com/ardaguclu)) [SIG Apps]

- Bump debian-base to v1.0.1 and debian-iptables to v11.0.3 ([#88882](https://github.com/kubernetes/kubernetes/pull/88882), [@tallclair](https://github.com/tallclair)) [SIG API Machinery, Cluster Lifecycle, Release and Testing]

## Changelog since v1.20.14

## Changes by Kind

### Bug or Regression

- Fixes a panic in kube-scheduler handling pods with invalid selectors ([#107558](https://github.com/kubernetes/kubernetes/pull/107558), [@Zheaoli](https://github.com/Zheaoli)) [SIG Scheduling]
- Fixes a rare race condition handling requests that timeout ([#107461](https://github.com/kubernetes/kubernetes/pull/107461), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

## Changelog since v1.23.4

## Changes by Kind

### API Change

Kubernetes workloads API to the new apps/v1beta2 group and version. The DaemonSet, Deployment, ReplicaSet, and StatefulSet objects are affected by this change. The new apps/v1beta2 group and version provide a stable and consistent API surface for building applications in Kubernetes. For details about deprecations and behavioral changes, see [Notable Features](#notable-features). SIG Apps intends to promote this version to GA in a future release.

[SIG Apps]: https://github.com/kuberne...