Add documentation for shutdown_behaviour option

website/source/docs/builders/amazon-ebs.html.md

@@ -219,6 +219,10 @@ builder.
 -   `windows_password_timeout` (string) - The timeout for waiting for a Windows
     password for Windows instances. Defaults to 20 minutes. Example value: "10m"
 
+-   `shutdown_behaviour` (string) - Automatically terminate instances on shutdown
+    incase packer exits ungracefully. Possible values are "stop" and "terminate",
+    default is stop.
+
 ## Basic Example
 
 Here is a basic example. You will need to provide access keys, and may need to change the AMI IDs according to what images exist at the time the template is run:

website/source/docs/builders/amazon-instance.html.md

@@ -244,6 +244,10 @@ builder.
 -   `windows_password_timeout` (string) - The timeout for waiting for a Windows
     password for Windows instances. Defaults to 20 minutes. Example value: "10m"
 
+-   `shutdown_behaviour` (string) - Automatically terminate instances on shutdown
+    incase packer exits ungracefully. Possible values are "stop" and "terminate",
+    default is stop.
+
 ## Basic Example
 
 Here is a basic example. It is completely valid except for the access keys: