Disable Mesh Expansion page. (#2086)

content/about/notes/1.0/index.md

@@ -100,3 +100,6 @@ be configured using [authentication policies](/docs/concepts/security/#authentic
 - There are Kubernetes manifests available for using Citadel standalone or with Citadel health checking enabled.
   There is not a Helm implementation of these modes.  See [Issue 6922](https://github.com/istio/istio/issues/6922)
   for more details.
+
+- Mesh expansion functionality, which lets you add raw VMs to a mesh is broken in 1.0. We're expecting to produce a
+patch that fixes this problem within a few days.

content/docs/setup/kubernetes/mesh-expansion/index.md

@@ -5,6 +5,9 @@ weight: 50
 keywords: [kubernetes,vms]
 ---
 
+{{< warning_icon >}} Mesh expansion is broken in the initial release of Istio 1.0. We expect to have a patch available that
+fixes this problem very soon. We apologize for the inconvenience.
+
 Instructions for integrating VMs and bare metal hosts into an Istio mesh
 deployed on Kubernetes.