doc: Fixes the licence in the debian copyright file.

resources/install/debian/copyright

@@ -1,14 +1,13 @@
-Format: http://dep.debian.net/deps/dep5
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: Jitsi Conference Focus
 Upstream-Contact: Emil Ivov <[email protected]>
 Source: https://github.com/jitsi/jicofo
 
 Files: *
-Copyright: 2013-2014 Jitsi
-License: LGPL-2.1
+Copyright: 2013-2018 Jitsi
+License: Apache 2.0
 
-License: LGPL-2.1
- On Debian systems, the full text of the GNU
- Lesser General Public License (LGPL) version
- 2.1 can be found in the file
- '/usr/share/common-licenses/LGPL-2.1'.
+License: Apache 2.0
+On Debian systems, the full text of the Apache licence
+version 2.0 can be found in the file
+'/usr/share/common-licenses/Apache-2.0'.