clutter_keyval_name() returns a pointer to a static array, not
newly allocated memory. Add a transfer annotation to indicate
that callers must not free the returned memory.
While add it, make the return value const to stress further that
callers shouldn't touch the returned memory.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3386>
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: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3155>
