bzr push into mysql-trunk branch (marko.makela:4491 to 4492)

[marko.makela]

 4492 Marko Mäkelä	2012-09-17 [merge]
      Null merge mysql-5.6 to mysql-trunk.

 4491 Marko Mäkelä	2012-09-17 [merge]
      Merge mysql-5.6 to mysql-trunk.

    modified:
      storage/innobase/btr/btr0btr.cc
      storage/innobase/btr/btr0cur.cc
      storage/innobase/buf/buf0lru.cc
      storage/innobase/ibuf/ibuf0ibuf.cc
      storage/innobase/include/page0zip.h
      storage/innobase/log/log0recv.cc
      storage/innobase/page/page0cur.cc
      storage/innobase/page/page0page.cc
      storage/innobase/page/page0zip.cc
      storage/innobase/row/row0import.cc
No bundle (reason: useless for push emails).