Added scary warning about not using the development server in production environments

git-svn-id: http://code.djangoproject.com/svn/django/trunk@188 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/tutorial02.txt

@@ -44,6 +44,9 @@ want to change the server's port, pass it as a command-line argument::
 
     django-admin.py runserver 8080
 
+DON'T use this server in anything resembling a production environment. It's
+intended only for use while developing.
+
 Now, open a Web browser and go to "/admin/" on your domain. You should see the
 admin's login screen: