Kubernetes release v1.13.4

Based on https://github.com/kubernetes/kubernetes/releases/tag/v1.13.4
Merge pull request #73646 from bradhoekstra/automated-cherry-pick-of-#73639-upstream-release-1.13

Automated cherry pick of #73639: Document default value for enableServiceLinks

Kubernetes-commit: a01f2185c25bfec3974aa8d66b497c6ce3c722d3
1 file changed