manual merge of ma_recovery.c (too big conflict to resolve in fmtool);
the merged Monty's code allows correct replaying of REDO_PURGE_BLOCKS
and was originally in
monty@mysql.com/narttu.mysql.fi|ChangeSet|20070829060310|44058


storage/maria/ma_recovery.c:
  * manually merging Monty's and Sanja's changes of the two last weeks
  to my massively modified version of this file. The merged Monty's
  code allows correct replaying of REDO_PURGE_BLOCKS and was originally
  in monty@mysql.com/narttu.mysql.fi|ChangeSet|20070829060310|44058 .
  * Setting the state to "STATE_CHANGED|etc" in Recovery is more
  logically done when we update the state in memory (for example
  records++).