Made copyright "secure".

Author: tuto193

debian/copyright

@@ -1,4 +1,4 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: gvm-tools
 
 Files: *
@@ -21,9 +21,8 @@ License: GPL-3+
  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, see <http://www.gnu.org/licenses/>.
+ along with this program.  If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU General Public
  License version 3 can be found in the file
  `/usr/share/common-licenses/GPL-3'.
-