Change the number of Footer Widgets in Genesis Framework

It has been a while since I needed to use a different number of Footer Widgets than the default in the Genesis Sample theme, which is 3. You used to be able to use this:

//* Add support for 2-column footer widgets
add_theme_support( 'genesis-footer-widgets', 2 );

In fact, the above is still in StudioPress’ tutorial for using Footer Widgets, so you could Imagine my surprise when it no longer worked.

Well, I found the answer buried in a post on the Community Forum. The answer is that StudioPress moved the setting that controls this out of the functions.php file and into:

config/theme-supports.php