Changed failmessage when entering unkown command

New users should be aware of the existence
of the "help" command when they try the
pfw for their first time
diff --git a/remote-processor/RemoteCommandHandlerTemplate.h b/remote-processor/RemoteCommandHandlerTemplate.h
index 000ab70..fbfa059 100644
--- a/remote-processor/RemoteCommandHandlerTemplate.h
+++ b/remote-processor/RemoteCommandHandlerTemplate.h
@@ -164,7 +164,7 @@
         if (!pRemoteCommandParserItem) {
 
             // Not found
-            strResult = "Command not found!";
+            strResult = "Command not found!\nUse \"help\" to show available commands";
 
             return false;
         }