* Build-Depend on debhelper (>= 9.20160709) rather than dh-systemd as
latter is deprecated. Fixes Lintian Error:
build-depends-on-obsolete-package
- * Build-Depend on the Python 3 version of the Sphinx packages to fix
- Lintian Warning: build-depends-on-python-sphinx-only
* Fix upstream version parsing in d/rules to account for -rcX.
* Build-Depend on debhelper (>= 9.20160709) | dh-systemd to keep
compatibility with Ubuntu 16.04, which does not yet have that