Dropped obsolete Free Software Foundation address pointing
to the FSF website instead as suggested by
https://www.gnu.org/licenses/gpl-howto.html


keeping intact the important part of the historical notice
as requested by the license.

Resolving rpmlint reported issue E: incorrect-fsf-address.

Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>
Part-of: <!3155>