- Make provides versioned
- Ensure that not both packages can be installed at the same time
by adding a conflicts

- Downgrade the recommends to suggests based on suggestion from
dimstar

- Make restart behavior an admin decision:
- drop feature-suse-refuse-manual-start-stop.patch
- introduce 2 new subpackages:
dbus-broker-allow-restart
dbus-broker-block-restart (default to reflect the old patch
behavior)

one of the 2 packages is required and leaves the admin the
choice if they want to be able to restart dbus-broker without
reboot or not.