Merge a part of r2911.5.5 from MySQL:
(the other part of this was merged in c5700)

  ------------------------------------------------------------
  revno: 2911.5.5
  committer: Vladislav Vaintroub <vvaintroub@mysql.com>
  branch nick: 5.1-innodb_plugin
  timestamp: Wed 2009-06-10 10:59:49 +0200
  message:
    Backport WL#3653 to 5.1 to enable bundled innodb plugin.
    Remove custom DLL loader code from innodb plugin code, use 
    symbols exported from mysqld.
  removed:
    storage/innodb_plugin/handler/handler0vars.h
    storage/innodb_plugin/handler/win_delay_loader.cc
  added:
    storage/mysql_storage_engine.cmake
    win/create_def_file.js
  modified:
    CMakeLists.txt
    include/m_ctype.h
    include/my_global.h
    include/my_sys.h
    include/mysql/plugin.h
    libmysqld/CMakeLists.txt
    mysql-test/mysql-test-run.pl
    mysql-test/t/plugin.test
    mysql-test/t/plugin_load-master.opt
    mysys/charset.c
    sql/CMakeLists.txt
    sql/handler.h
    sql/mysql_priv.h
    sql/mysqld.cc
    sql/sql_class.cc
    sql/sql_class.h
    sql/sql_list.h
    sql/sql_profile.h
    storage/Makefile.am
    storage/archive/CMakeLists.txt
    storage/blackhole/CMakeLists.txt
    storage/csv/CMakeLists.txt
    storage/example/CMakeLists.txt
    storage/federated/CMakeLists.txt
    storage/heap/CMakeLists.txt
    storage/innobase/CMakeLists.txt
    storage/innobase/handler/ha_innodb.cc
    storage/innodb_plugin/CMakeLists.txt
    storage/innodb_plugin/handler/ha_innodb.cc
    storage/innodb_plugin/handler/handler0alter.cc
    storage/innodb_plugin/handler/i_s.cc
    storage/innodb_plugin/plug.in
    storage/myisam/CMakeLists.txt
    storage/myisammrg/CMakeLists.txt
    win/Makefile.am
    win/configure.js