Change example to set secondaryThrottle to false

Since secondary throttle default is true since 2.4, example should show how to set it to false (or off) since the page that explains when to to turn it off links to here.

Signed-off-by: kay <kay.kim@10gen.com>
restarting does not require special option

Signed-off-by: kay <kay.kim@10gen.com>