fix FSF address in sources/headers

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
diff --git a/src/vty/buffer.c b/src/vty/buffer.c
index e0abe81..8862da9 100644
--- a/src/vty/buffer.c
+++ b/src/vty/buffer.c
@@ -16,8 +16,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with GNU Zebra; see the file COPYING.  If not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
  */
 
 #include <stdio.h>