oes not specify a version number of the
    GNU General Public License, you may choose any version ever published
    by the Free Software Foundation.</p>

<p>If the Program specifies that a proxy can decide which future
    versions of the GNU General Public License can be used, that proxy's
    public statement of acceptance of a version permanently authorizes you
    to choose that version for the Program.</p>

<p>Later license versions may give you additional or different
    permissions.  However, no a