Merge InnoDB-4.0.13; DROP FOREIGN KEY now works


innobase/buf/buf0flu.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/dict/dict0crea.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/dict/dict0dict.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/dict/dict0load.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/ibuf/ibuf0ibuf.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/include/db0err.h:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/include/dict0dict.h:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/include/row0ins.h:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/lock/lock0lock.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/os/os0file.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/row/row0ins.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/row/row0mysql.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/row/row0sel.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/row/row0upd.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/srv/srv0srv.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
innobase/ut/ut0ut.c:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works
sql/ha_innodb.cc:
  Merge InnoDB-4.0.13; DROP FOREIGN KEY now works