until it has been comprehensive tested.


innobase/log/log0log.c:
  Added general documentation of InnoDB redo-logs.
innobase/trx/trx0roll.c:
  Prepared transactions are not rolled back in a recovery if
  innobase_force_recovery = 0. But they are rolled back if
  innobase_force_recovery > 0.
innobase/trx/trx0trx.c:
  Disable the XA code in InnoDB crash recovery until it has been
  comprehensive tested. SHOW INNODB STATUS now prints different
  output for prepared transactions.
innobase/trx/trx0undo.c:
  Do not unnecessary write X/Open XA XID. XID is written in the prepare.
  Space for a XID should be reserved at this stage.
sql/ha_innodb.cc:
  Remove error.