templates: change {obsolete} to emit only "obsolete" or "" The {obsolete} template function can currently emit "stable", "unstable", "extinct", or "suspended". The distinction between "extinct" and "suspended" seems likely to be more confusing that enlightening, and "stable" and "unstable" are not even obsolete. Let's simplify it to just emit "obsolete" for obsolete changesets and "" for others. That will also make it much easier to test for obsolete changsets and do things like "if(obsolete, obsolete, troubles)".