Comment 16 for bug 2006402

I've created LP:2027613 to document the change to override_dh_installsystemd, as mentioned above. I've also completed manual testing of upgrading landscape client when the service is not running, and the service remained down, as expected. As mentioned in prev comment, I have previously done other upgrade testing on both focal and jammy.

I've also removed all of the bug references from the new changelog entry, as advised by vorlon.