Add help text for rollback in kubectl rolling-update

docs/man/man1/kubectl-rolling-update.1

@@ -199,9 +199,12 @@ $ cat frontend\-v2.json | kubectl rolling\-update frontend\-v1 \-f \-
 # name of the replication controller.
 $ kubectl rolling\-update frontend\-v1 frontend\-v2 \-\-image=image:v2
 
-# Update the pods of frontend by just changing the image, and keeping the old name
+# Update the pods of frontend by just changing the image, and keeping the old name.
 $ kubectl rolling\-update frontend \-\-image=image:v2
 
+# Abort and reverse an existing rollout in progress (from frontend\-v1 to frontend\-v2).
+$ kubectl rolling\-update frontend\-v1 frontend\-v2 \-\-rollback
+
 
 .fi
 .RE

docs/user-guide/kubectl/kubectl_rolling-update.md

@@ -61,9 +61,12 @@ $ cat frontend-v2.json | kubectl rolling-update frontend-v1 -f -
 # name of the replication controller.
 $ kubectl rolling-update frontend-v1 frontend-v2 --image=image:v2
 
-# Update the pods of frontend by just changing the image, and keeping the old name
+# Update the pods of frontend by just changing the image, and keeping the old name.
 $ kubectl rolling-update frontend --image=image:v2
 
+# Abort and reverse an existing rollout in progress (from frontend-v1 to frontend-v2).
+$ kubectl rolling-update frontend-v1 frontend-v2 --rollback
+
 ```
 
 ### Options
@@ -119,7 +122,7 @@ $ kubectl rolling-update frontend --image=image:v2
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra on 19-Oct-2015
+###### Auto generated by spf13/cobra on 11-Nov-2015
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl_rolling-update.md?pixel)]()

pkg/kubectl/cmd/rollingupdate.go

@@ -58,8 +58,11 @@ $ cat frontend-v2.json | kubectl rolling-update frontend-v1 -f -
 # name of the replication controller.
 $ kubectl rolling-update frontend-v1 frontend-v2 --image=image:v2
 
-# Update the pods of frontend by just changing the image, and keeping the old name
+# Update the pods of frontend by just changing the image, and keeping the old name.
 $ kubectl rolling-update frontend --image=image:v2
+
+# Abort and reverse an existing rollout in progress (from frontend-v1 to frontend-v2).
+$ kubectl rolling-update frontend-v1 frontend-v2 --rollback
 `
 )