Merge branch 'ch/add-auto-submitted-in-sample-post-receive-email'

* ch/add-auto-submitted-in-sample-post-receive-email:
  Add Auto-Submitted header to post-receive-email

Author: gitster

contrib/hooks/post-receive-email

@@ -237,6 +237,7 @@ generate_email_header()
 	X-Git-Reftype: $refname_type
 	X-Git-Oldrev: $oldrev
 	X-Git-Newrev: $newrev
+	Auto-Submitted: auto-generated
 
 	This is an automated email from the git hooks/post-receive script. It was
 	generated because a ref change was pushed to the repository containing