Prevent people from updates with critical components

[C. Gatzemeier]

Hi Joachim,

let me just assure you that IMHO appropriate warnings before critical
updates could prevent a lot of headaches.

As the release notes are tracked/composed from launchpad entries, maybe
the system could be made generic enough to work on top of bug trackers'
tagging facilities (debian BTS/launchpad) for its "bug radar" to compile
the list of issues in sight.

Of course this would expose existing issues to a broader audience up
front, but that sounds like a good thing (as "release often" also
somehow means "expose often".), not only for users not unnecessarily
running into issues, but also for developers to focus on critical
bugs in current releases besides new feature development.

Cheers,
Christian