How to enable Restart X server shortcut (Ctrl+Alt+Backspace)

Back in Fedora 11 they disabled the Ctrl+Alt+Backspace shortcut that restarted the X server.  Some people liked this because they would always hit it by accident and that would restart the X server and it would mess things up if they were in the middle of something.  But some other people didn't like this because they used Ctrl+Alt+Backspace to restart X when there programs froze.

So if you are from the first group of people then your ok,
But if you are from the second then this is how to enable it.

First go to System > Preferences > Keyboard
Then click on the "Layouts" tab
Click on "Options"
And this window will appear:

Click on the drop down arrow of "Key sequence to kill the X server"
And check the checkbox "Control + Alt + Backspace"

And there you go now when you press Ctrl+Alt+Backspace it will restart the X server