Merge branch 'master' of https://github.com/kubernetes/kubernetes.github.io into release-1.6

* 'master' of https://github.com/kubernetes/kubernetes.github.io: (21 commits)
  revert issue URL, turn into link
  docs/admin/authorization: remove duplicated phrase (#3045)
  update urls
  Fix a typo and update one url
  update urls
  update a url
  update urls
  update invalid links
  update some urls
  modify the url of RestartPolicy (#3034)
  Fix the url
  amend the url
  amend the readiness probes (#3031)
  modify the link url (#3030)
  change the url (#3029)
  Fix the typo.
  Fix the link url
  delete redundant example
  fix typo
  change a link's url
  ...

# Conflicts:
#	docs/admin/authorization/index.md

docs/tasks/administer-cluster/dns-horizontal-autoscaling.md

@@ -225,7 +225,7 @@ a future development. The current implementation, which uses the number of nodes
 and cores in cluster, is limited.
 
 Support for custom metrics, similar to that provided by
-[Horizontal Pod Autoscaling](http://kubernetes.io/docs/user-guide/horizontal-pod-autoscaling/),
+[Horizontal Pod Autoscaling](/docs/user-guide/horizontal-pod-autoscaling/),
 is under consideration as a future development.
 
 {% endcapture %}