- Patch #5393 by Goba: changes the search hook return value, and requires an array
  containing two elements, the first being the requested title, and the second being
  the result list. Advantages:
    * Cleaner search code in common.inc
    * Po extraction is possible and works fine
    * No hardcoded exceptions for node and comment modules, since any module can
      return results in order of relevance (or another order)