pkg net/http, var ErrShortBody //deprecated
pkg net/http, var ErrUnexpectedTrailer //deprecated
pkg net/http, var ErrWriteAfterFlush //deprecated
pkg net/http/httptest, type ResponseRecorder struct, HeaderMap //deprecated
pkg net/http/httputil, func NewClientConn //deprecated
pkg net/http/httputil, func NewProxyClientConn //deprecated
pkg net/http/httputil, func NewServerConn //deprecated

* Return apiserver panics as 500 errors instead terminating the apiserver process. ([#68001](https://github.com/kubernetes/kubernetes/pull/68001), [@sttts](https://github.com/sttts))
* adjusted http/2 buffer sizes for apiservers to prevent starvation issues between concurrent streams ([#67902](https://github.com/kubernetes/kubernetes/pull/67902), [@liggitt](https://github.com/liggitt))

* Update to use go 1.11.13 ([#81542](https://github.com/kubernetes/kubernetes/pull/81542), [@BenTheElder](https://github.com/BenTheElder))
* Fix Azure client requests stuck issues on http.StatusTooManyRequests (HTTP Code 429). ([#81279](https://github.com/kubernetes/kubernetes/pull/81279), [@feiskyer](https://github.com/feiskyer))

- Fix public IP not found issues for VMSS nodes ([#80703](https://github.com/kubernetes/kubernetes/pull/80703), [@feiskyer](https://github.com/feiskyer))
- Fix Azure client requests stuck issues on http.StatusTooManyRequests (HTTP Code 429). ([#81279](https://github.com/kubernetes/kubernetes/pull/81279), [@feiskyer](https://github.com/feiskyer))

- Changed: default "Accept: */*" header added to HTTP probes. See https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#http-probes (https://github.com/kubernetes/website/pull/24756) ([#95641](https://github.com/kubernetes/kubernetes/pull/95641), [@fonsecas72](https://github.com/fonsecas72)) [SIG Network and Node]...

## Changelog since v1.23.16

## Changes by Kind

### Feature

- Kubelet TCP and HTTP probes are more effective using networking resources: conntrack entries, sockets, ... 

### Bug or Regression

pkg math/big, method (*Rat) SetUint64(uint64) *Rat
pkg net/http, const SameSiteNoneMode = 4
pkg net/http, const SameSiteNoneMode SameSite
pkg net/http, const StatusEarlyHints = 103
pkg net/http, const StatusEarlyHints ideal-int
pkg net/http, func NewRequestWithContext(context.Context, string, string, io.Reader) (*Request, error)
pkg net/http, method (Header) Clone() Header
pkg net/http, method (*Request) Clone(context.Context) *Request

- github.com/gobuffalo/here: [v0.6.0](https://github.com/gobuffalo/here/tree/v0.6.0)
- github.com/hpcloud/tail: [v1.0.0](https://github.com/hpcloud/tail/tree/v1.0.0)
- github.com/jimstudt/http-authentication: [3eca13d](https://github.com/jimstudt/http-authentication/tree/3eca13d)
- github.com/klauspost/cpuid: [v1.2.0](https://github.com/klauspost/cpuid/tree/v1.2.0)
- github.com/kr/logfmt: [b84e30a](https://github.com/kr/logfmt/tree/b84e30a)

- Fixed an issue where kubelet does not set case-insensitive headers for http probes. (#117182, @dddddai) ([#117331](https://github.com/kubernetes/kubernetes/pull/117331), [@dddddai](https://github.com/dddddai)) [SIG API Machinery, Apps and Node]