fix FSF address in sources/headers

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
diff --git a/src/vty/command.c b/src/vty/command.c
index 290b12d..149eca3 100644
--- a/src/vty/command.c
+++ b/src/vty/command.c
@@ -18,8 +18,8 @@
 
 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>
 #include <stdlib.h>