Merge pull request #10855 from thockin/docs-debug-svcs

docs/cluster-large.md

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+<h1>*** PLEASE NOTE: This document applies to the HEAD of the source
+tree only. If you are using a released version of Kubernetes, you almost
+certainly want the docs that go with that version.</h1>
+
+<strong>Documentation for specific releases can be found at
+[releases.k8s.io](http://releases.k8s.io).</strong>
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 # Kubernetes Large Cluster
 
 ## Support