Integrate Debian packaging changes

debian/control:
* restructure to make it easier to incorporate further changes
* update package descriptions
* update project URL

debian/rules:
* use proper hardening syntax
* restructure to make it easier to incorporate further changes
* remove useless comment

debian/compat: update compatibility version

debian/coryright: update to match Debian format

Change-Id: I49cc9239b15dc77d782914ca2547e601d049acdc
Related: OS#1694
diff --git a/debian/compat b/debian/compat
index 7f8f011..ec63514 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-7
+9