--- a/plugins/mod_admin_telnet.lua	Sat Feb 25 17:41:39 2017 +0100
+++ b/plugins/mod_admin_telnet.lua	Wed Mar 01 02:38:05 2017 +0100
@@ -1167,6 +1167,12 @@
 	return true;
 end
 
+module:hook("server-stopping", function(event)
+	for conn, session in pairs(sessions) do
+		session.print("Shutting down: "..(event.reason or "unknown reason"));
+	end
+end);
+
 -------------
 
 function printbanner(session)