Fix FSF address in file headers
diff --git a/ip/ip6tunnel.c b/ip/ip6tunnel.c
index 463be42..25d5ba3 100644
--- a/ip/ip6tunnel.c
+++ b/ip/ip6tunnel.c
@@ -12,8 +12,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses>.
*/
/*
* Author: