Add missing license reference

debian/changelog

@@ -1,3 +1,9 @@
+cacert-boardvoting (0.6.0-2) UNRELEASED; urgency=medium
+
+  * Add missing license reference
+
+ -- Jan Dittberner <jandd@cacert.org>  Mon, 12 Aug 2019 19:57:13 +0200
+
 cacert-boardvoting (0.6.0-1) stretch-cacert; urgency=medium
 
   * New upstream version

debian/copyright

@@ -6,3 +6,17 @@ Source: https://git.cacert.org/gitweb/?p=cacert-boardvoting.git
 Files: *
 Copyright: 2017-2019 Jan Dittberner
 License: Apache-2.0
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this program except in compliance with the License.
+ You may obtain a copy of the License at
+ .
+     http://www.apache.org/licenses/LICENSE-2.0
+ .
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ .
+ On Debian systems, the full text of the Apache License, Version 2.0 can be
+ found in the file `/usr/share/common-licenses/Apache-2.0`