Commenting out the release-notes for 1.6

Original text

Signed-off-by: Mary Anthony <mary@docker.com>

docs/misc/release-notes.md

@@ -1,5 +1,6 @@
 <!--[metadata]>
 +++
+draft=true
 title = "Docker Engine"
 description = "Release notes for Docker 1.x."
 keywords = ["docker, documentation, about, technology, understanding,  release"]
@@ -18,6 +19,13 @@ blog](https://blog.docker.com/2015/04/docker-release-1-6/).
 
 
 
+## Docker Engine 1.6.0 features
+
+For a complete list of engine patches, fixes, and other improvements, see the
+[merge PR on GitHub](https://github.com/docker/docker/pull/11635). You'll also
+find [a changelog in the project
+repository](https://github.com/docker/docker/blob/master/CHANGELOG.md).
+
 ## Docker Engine 1.6.0 features
 
 For a complete list of engine patches, fixes, and other improvements, see the