commit a73e0f8cdfec1c9199ffe696146ba7d677c4c10d
  Author: Daniel Stone <daniel@fooishbar.org>
  Date:   Thu Jun 1 18:47:47 2006 +0000

    Die XTESTEXT1, die!

Citing an email from the xorg-modular mailing list:

On Tuesday 21 February 2006 23:04, Enrico Weigelt wrote:
> Hi folks,
>
> I'm wondering what's the difference between XTEST and XTESTEXT1
> (the second one can be configured w/ my current patch ...)
> Are they both the same ( -> XTest extension ) ?
> Can I put both symbols together ?

They're not the same extension.  XTest is the one you want, if you want
either.  The other hasn't been built by default in ages and I should probably
go ahead and nuke it from the tree.

- ajax