Update get-orig-source section in debian/rules.
Update years in debian/copyright.
Update debian/control:
- delete obsolete DM-Upload-Allowed field
- bump Standards-Version to 3.9.5 (was 3.9.3): no changes required
Bump debhelper version to 9 (was 7); update debian/compat.
Simplify debian/rules a bit.
Update debian/changelog.