* Support context completion for kubectl config use-context ([#42336](https://github.com/kubernetes/kubernetes/pull/42336), [@superbrothers](https://github.com/superbrothers))
* print warning when delete current context ([#42538](https://github.com/kubernetes/kubernetes/pull/42538), [@adohe](https://github.com/adohe))

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- Improved handling of jsonpath expressions for `kubectl wait --for`. It is now possible to use simple filter expressions which match on a field's content. ([#118748](https://github.com/kubernetes/kubernetes/pull/118748), [@andreaskaris](https://github.com/andreaskaris))

  `I DON'T know,' said the Caterpillar.

  Alice said nothing:  she had never been so much contradicted in
her life before, and she felt that she was losing her temper.

  `Are you content now?' said the Caterpillar.

  `Well, I should like to be a LITTLE larger, sir, if you
wouldn't mind,' said Alice:  `three inches is such a wretched
height to be.'

signCtx(signature, priv, message, context) } func signCtx(signature []byte, priv *PrivateKey, message []byte, context string) ([]byte, error) { fipsSelfTest() // FIPS 186-5 specifies Ed25519 and Ed25519ph (with context), but not Ed25519ctx. fips140.RecordNonApproved() // Note that per RFC 8032, Section 5.1, the context SHOULD NOT be empty. if l := len(context); l > 255 { return nil, errors.New("ed25519: bad Ed25519ctx context length: " + strconv.Itoa(l)) } return signWithDom(signature, priv, message,...

* Fixes CVE-2019-11250: client-go header logging (at verbosity levels >= 7) now masks `Authorization` header contents ([#81330](https://github.com/kubernetes/kubernetes/pull/81330), [@tedyu](https://github.com/tedyu))

signCtx(signature, priv, message, context) } func signCtx(signature []byte, priv *PrivateKey, message []byte, context string) ([]byte, error) { fipsSelfTest() // FIPS 186-5 specifies Ed25519 and Ed25519ph (with context), but not Ed25519ctx. fips140.RecordNonApproved() // Note that per RFC 8032, Section 5.1, the context SHOULD NOT be empty. if l := len(context); l > 255 { return nil, errors.New("ed25519: bad Ed25519ctx context length: " + strconv.Itoa(l)) } return signWithDom(signature, priv, message,...

* `kubeadm init` can now omit the tainting of the master node if configured to do so in `kubeadm.yaml` using `noTaintMaster: true`. For example, uses can create a file with the content:

```
apiVersion: [kubeadm.k8s.io/v1alpha1](http://kubeadm.k8s.io/v1alpha1)
kind: MasterConfiguration
kubernetesVersion: v1.9.1
noTaintMaster: true
```