Fixed "discover" in the handler API.

Fixed problem where handlerton was not zero'ed. I need to look around, I suspect this problem is more widespread. 

Plugins now when compiled or not compiled work correctly with status variables. 
Status variables from plugins now set their own names (removed bit where plugin name was pre-appended this broke Innodb and Cluster)
A few Makefile cleanups. 

This changeset moves the ha_myisam files to their storage directories.  It also includes updates for all engines include patch for windows builds. 

Major changes are plug.in files created for almost all storage engines. A few stray BDB references removed. 

instance.cc:
  Removed wrongly placed closing brace
item_geofunc.cc:
  needed to pass in a TABLE_SHARE* instead of a TABLE*

into  bk-internal.mysql.com:/data0/bk/mysql-5.1

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.1-clean2

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.1-clean2

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-kt

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-kt

into  mysql.com:/home/hf/work/mysql-5.0.20910

into  production.mysql.com:/usersnfs/rkalimullin/mysql-5.0

into  zim.(none):/home/brian/mysql/remove-bdb-5.1

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1

into  xiphis.org:/opt2/tmp/autopush/mysql-5.0-fixbuild

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.1-clean2

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-kt

into  mysql.com:/usr/home/ram/work/mysql-5.0

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0

into  mysql.com:/home/hf/work/mysql-5.0.20910

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1

Fix for bug #21059  Server crashes on join query with large dataset with NDB tables: do not release operation records for on-going read_multi_range

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0

  bug #18184  SELECT ... FOR UPDATE does not work..: New test case
ha_ndbcluster.h, ha_ndbcluster.cc, NdbConnection.hpp:
  Fix for bug #21059  Server crashes on join query with large dataset with NDB tables: Releasing operation for each intermediate batch, before next call to trans->execute(NoCommit);

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1