xorg-server-for-tests

[Ian Eure]

Hi all,

I’m wondering what the purpose of xorg-server-for-tests in 
gnu/packages/xorg.scm is?  It inherits from the normal xorg-server 
package, but drops to the older version 21.1.15, vs. the normal 
package’s 21.1.21.  No other changes are made.

As an experiment, I changed it to:

   (define-public xorg-server-for-tests xorg-server)

And rebuilt dependents.  This hasn’t quite completed, but 
everything’s built fine so far.

Does it serve any functional purpose?

Thanks,
 -- Ian