Update FSF license notices to use URL instead of address

manual-tests/upgrade-loop.js

@@ -15,9 +15,7 @@
 // Lesser General Public License for more details.
 //
 // You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the
-// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-// Boston, MA 02111-1307, USA.
+// License along with this library. If not, see <https://www.gnu.org/licenses/>.
 
 // PURPOSE: This script runs in an infinite loop; it alternates
 // upgrading and downgrading.  The idea is that a parent test process