remove PACKAGE_xxx vars from configure-generated headers to avoid clash
bump version to 2.0
remove COPYING.DOSEMU references from autoconf stuff
revert "Update copyright line to 2007."
revert "Update year to 2006."
revert commit 51121d23f4f652960914e836b6860ccde4a22222

Author: Bart Oldeman <bartoldeman@users.sourceforge.net>
Date:   Mon Dec 12 22:05:14 2005 +0000

    From: Hans de Goede <j.w.r.degoede@hhs.nl>
    Clarify copyrights. This is necessary for inclusion of DOSEMU into Fedora
    Extras, which is what Hans likes to do.
revert references to COPYING.DOSEMU

Namely this patch:
commit 19698a4e44327f11e2ab13016ed311a12d85a944
Author: Hans Lermen <lermen@dosemu.org>
Date:   Thu Sep 10 22:44:08 1998 +0200
change default license to "GPLv2 or later"

The GPL faq says:
---
While you may release your project (either your original work and/or work
that you received and modified) under GPLv2-or-later in this case, note
that the other code you're using must remain under GPLv2 only. As long as
your project depends on that code, you won't be able to upgrade the license
of your project to GPLv3-or-later, and the work as a whole (any combination
of both your project and the other code) can only be conveyed under the term
of GPLv2.
---
update year to 2014