Item12542:

   * cache non-standard %META data and make it searchable
   * fixed some crashes using MemoryArrays
   * defaulting to Segmentable archivist as it is proven to be stable
  



git-svn-id: http://svn.foswiki.org/trunk/DBCacheContrib@16821 0b4bb1d4-4e5a-0410-9cc4-b2b747904278