update changelog for 17.11.0-ce-rc1

Signed-off-by: Andrew Hsu <andrewhsu@docker.com>

CHANGELOG.md

@@ -1 +1,18 @@
 # Changelog
+
+Items starting with `DEPRECATE` are important deprecation notices. For more
+information on the list of deprecated flags and APIs please have a look at
+https://docs.docker.com/engine/deprecated/ where target removal dates can also
+be found.
+
+## 17.11.0-ce (2017-11-DD)
+
+IMPORTANT: Docker CE 17.11 is the first Docker release based on
+[containerd 1.0 beta](https://github.com/containerd/containerd/releases/tag/v1.0.0-beta.2).
+Docker CE 17.11 and later won't recognize containers started with
+previous Docker versions. If using
+[Live Restore](https://docs.docker.com/engine/admin/live-restore/#enable-the-live-restore-option),
+you must stop all containers before upgrading to Docker CE 17.11.
+If you don't, any containers started by Docker versions that predate
+17.11 won't be recognized by Docker after the upgrade and will keep
+running, un-managed, on the system.