WL#2763 - MySQL plugin interface: step 1
Manual merge from CNET tree.

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new

2. All have_xxx variables are now selectable.

  updated include directory after move to storage directory
mysql.sln:
  updated locations of storage engines
myisam.vcproj:
  Rename: VC++Files/myisam/myisam.vcproj -> VC++Files/storage/myisam/myisam.vcproj
heap.vcproj:
  Rename: VC++Files/heap/heap.vcproj -> VC++Files/storage/heap/heap.vcproj
innobase.vcproj:
  Rename: VC++Files/innobase/innobase.vcproj -> VC++Files/storage/innobase/innobase.vcproj
myisammrg.vcproj:
  Rename: VC++Files/myisammrg/myisammrg.vcproj -> VC++Files/storage/myisammrg/myisammrg.vcproj
bdb.vcproj:
  Rename: VC++Files/bdb/bdb.vcproj -> VC++Files/storage/bdb/bdb.vcproj

  - removed some returns on ndb internal error codes, return ndb cause in warnings
  - moved all errorcode mapping mysqld-ndb to ndberror.c
  - ndb util thread to discover all ndb tables at startup
  - ndb util thread to wait for mysqld startup

    update test result for conflicting error codes

    Fix problem when creating shadow table

     since NDB$FRAGMENT is automatically added, there was a over run in the struct

This is a merge of 5.0 -> 5.1 + some code from old 5.1 tree to get all tests to work and keep the .frm format the same as the old 5.1 tree.

into  mysql.com:/home/my/mysql-5.1

(Main reason for reordering was to get rid of compiler warnings for order of element initialization)

into  mysql.com:/my/mysql-5.0

into  mysql.com:/home/my/mysql-5.0

(Caused sp-security to fail)

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  mysql.com:/my/mysql-5.0

Destroy LOCK_uuid_generator

into  hasky.mysql.fi:/home/jani/mysql-5.0

into  fedora.(none):/home/reggie/bk/mysql-5.0-new

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0

into mysql.com:/home/hf/work/mysql-5.0.9551

into mysql.com:/home/hf/work/mysql-5.0.9551

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0-tmp

  Additional fix for bug#14093

that in mysql_rm_table_part2_with_lock() previously we needed to open
same file twice. Now once is enough.

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0-tmp

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0-tmp

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0-tmp

into  mysql.com:/opt/local/work/mysql-5.0-14210

into mysql.com:/home/hf/work/mysql-5.0.9551