What happened to "use control-alt-backspace to terminate X server?"

[Rick Thomas <rbthomas@pobox.com>]

In Wheezy, I used to be able to use
    dpkg-reconfigure keyboard-configuration
to (among other things) set the option to use control-alt-backspace to terminate the X server.

But in Jessie, "dpkg-reconfigure keyboard-configuration" asks no questions and makes no changes.


What is the preferred method of configuring the keyboard in Jessie?

Thanks!

Rick