- make ha_berkeley::cmp_ref() take into account that auto-generated PKs 
   are stored in LSB-first order. 
 - Remove the temporary code that made the bugfix work for innodb only 


mysql-test/r/bdb.result:
  Adjust test-results.
sql/ha_berkeley.cc:
  BUG#28591: make the fix work for BDB tables too:
   - make ha_berkeley::cmp_ref() take into account that auto-generated PKs 
     are stored in LSB-first order.
sql/sql_select.cc:
  BUG#28591: Remove "innodb only" clause as the fix now works for BDB too
sql/table.cc:
  BUG#28591: Remove "innodb only" clause as the fix now works for BDB too