* completly overhaul URL generating. Now things like debug or language

* completly overhaul URL generating. Now things like debug or language
  options should get preserved on subsequent links
* Move param handling from Search.pm to CGI.pm since that is more appropriate
  nowadays (some of the other stuff should really move to DB.pm, too)
* be stricter about what is allowed after package name in URLs
  (only architecture really) so that we can avoid more false
  URL interpretation