* debian/copyright: amend years.
* debian/control: use v12 mode of debhelper-compat package.
* debian/control: declare "Rules-Requires-Root: no".
* debian/copyright: update link to HTTPS, reported by duck(1).
* debian/copyright: amend years.
* debian/control: use v12 mode of debhelper-compat package.
* debian/control: declare "Rules-Requires-Root: no".
* debian/copyright: update link to HTTPS, reported by duck(1).