Update the version info in About
Update 3.6-era $RT:: style to modern RT-> calls
Update disabling of the Quick Search prefs

While we're at it, remove all links to that prefs page so that most
people won't see the "Sorry, you can't" message.
Update M::I and build framework
Remove support for pre-2006 public dist/bug pages

Nothing should be hitting these URLs, and if they are, it's time to 404
and get 'em fixed.