* apiserver: fixes handling and logging of panics in REST handlers to prevent crashes ([#71076](https://github.com/kubernetes/kubernetes/pull/71076), [@liggitt](https://github.com/liggitt))
* Upgrade golang.org/x/net image to release-branch.go1.10 ([#70663](https://github.com/kubernetes/kubernetes/pull/70663), [@wenjiaswe](https://github.com/wenjiaswe))

- Added `--concurrency` flag to configure the concurrency of `kubectl diff` execution, defaults to 1. ([#118810](https://github.com/kubernetes/kubernetes/pull/118810), [@brancz](https://github.com/brancz))
- Added `ConsistentListFromCache` feature gate that allows apiserver to serve consistent lists from cache. ([#118508](https://github.com/kubernetes/kubernetes/pull/118508), [@serathius](https://github.com/serathius))

## Changelog since v1.4.2-beta.1

### Other notable changes

* Fix non-starting node controller in 1.4 branch ([#34895](https://github.com/kubernetes/kubernetes/pull/34895), [@wojtek-t](https://github.com/wojtek-t))

* Actually fix local-cluster-up on 1.5 branch ([#40501](https://github.com/kubernetes/kubernetes/pull/40501), [@lavalamp](https://github.com/lavalamp))

## Urgent Upgrade Notes

### (No, really, you MUST read this before you upgrade)

- kube-apiserver:

balena-devices.com
balestrand.no
ballangen.no
ballooning.aero
balsan-sudtirol.it
balsan-suedtirol.it
balsan-südtirol.it
balsan.it
balsfjord.no
bambina.jp
bamble.no
banamex
band
bandai.fukushima.jp
bando.ibaraki.jp
bank
bar
bar.pro
barcelona
barclaycard
barclays
bardu.no
barefoot
bargains
bari.it
baria-vungtau.vn
barletta-trani-andria.it
barlettatraniandria.it

  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid
  linking directly to the master branch. This ensures that links reference a
  specific point in time, rather than a document that may change over time.
  

- Kubeadm now prints warnings instead of throwing errors if the current system time is outside of the NotBefore and NotAfter bounds of a loaded certificate.  ([#94504](https://github.com/kubernetes/kubernetes/pull/94504), [@neolit123](https://github.com/neolit123))

16EB..16F0    ; valid                  ;      ; NV8    # 3.0  RUNIC SINGLE PUNCTUATION..RUNIC BELGTHOR SYMBOL
16F1..16F8    ; valid                                  # 7.0  RUNIC LETTER K..RUNIC LETTER FRANKS CASKET AESC
16F9..16FF    ; disallowed                             # NA   <reserved-16F9>..<reserved-16FF>
1700..170C    ; valid                                  # 3.2  TAGALOG LETTER A..TAGALOG LETTER YA

  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid
  linking directly to the master branch. This ensures that links reference a
  specific point in time, rather than a document that may change over time.