Bug#321863: xserver-xfree86: check if will make new XF86Config-4 first

[Dan Jacobson <jidanni@jidanni.org>]

Package: xserver-xfree86
Version: 4.3.0.dfsg.1-13
Severity: minor

I note if one does
# dpkg-reconfigure xserver-xfree86
one then answers lots of questions.  But in the end it is all a waste,
in the case one does not have the right comments in XF86Config-4.

Therefore, before getting started, the user should be told "your
XF86Config-4 is apparently not being maintained by this program ...
..."

Removing XF86Config-4 and then doing dpkg-reconfigure xserver-xfree86
also just asks a lot of questions, but in the end, nothing useful is written.
# find /etc -mtime -1 -type f
proves it.