duplicate fields removed, st_mysql_storage_engine added to support
run-time handlerton initialization (no compiler warnings), handler API
is now tied to MySQL version, handlerton->plugin mapping added
(slot-based), dummy default_hton removed, plugin-type-specific
initialization generalized, built-in plugins are now initialized too,
--default-storage-engine no longer needs a list of storage engines
in handle_options().

mysql-test-run.pl bugfixes

into  mysql.com:/home/alexi/innodb/mysql-5.1-ss547
 Null merge

into  mysql.com:/home/alexi/innodb/mysql-5.0-ss547-work
 Null merge

 Fix BUG#19542 "InnoDB doesn't increase the Handler_read_prev counter".

 Fix BUG#19542 "InnoDB doesn't increase the Handler_read_prev counter.
 

into  mysql.com:/home/psergey/mysql-5.1-merge2

into  xiphis.org:/home/acurtis/mysql-5.1-merge

into  mysql.com:/home/ndbdev/ngrishakin/mysql-5.1-new

  Delete: mysql-test/r/ndb_partition_range.result
.del-ndb_partition_list.result~7af68cd45e74abf:
  Delete: mysql-test/r/ndb_partition_list.result
.del-ndb_partition_key.result~68b9a59cff8c9840:
  Delete: mysql-test/r/ndb_partition_key.result
.del-ndb_partition_error.result~944f84894e323e9:
  Delete: mysql-test/r/ndb_partition_error.result
.del-ndb_blob_partition.result~fda88ddfc5477a7e:
  Delete: mysql-test/r/ndb_blob_partition.result
.del-ndb_partition_range.test~af8f9016b6648239:
  Delete: mysql-test/t/ndb_partition_range.test
.del-ndb_partition_list.test~940289b3d58595ca:
  Delete: mysql-test/t/ndb_partition_list.test
.del-ndb_partition_key.test~ed7b15c91f66558d:
  Delete: mysql-test/t/ndb_partition_key.test
.del-ndb_partition_error.test~2da477be29be041f:
  Delete: mysql-test/t/ndb_partition_error.test
.del-ndb_blob_partition.test~ea99ef9759705ce3:
  Delete: mysql-test/t/ndb_blob_partition.test

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19010

into  mysql.com:/home/ndbdev/jmiller/clones/mysql-5.1-new

  Updated per lars
rpl_row_flsh_tbls.test:
  updated per lars

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1

into  mysql.com:/usr_rh9/home/elkin.rh9/MySQL/FIXES/5.1-bug19728_regex_win

regex is fixed for windows.

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1

into  mysql.com:/home/mysql-5.1-19509.19509

into  mysql.com:/home/ndbdev/jmiller/clones/mysql-5.1-new

into  mysql.com:/home/mysql-5.1-19509

into  linux.site:/home/reggie/work/mysql-5.1-test

into  mysql.com:/home/psergey/mysql-5.1-merge6

into  mysql.com:/home/psergey/mysql-5.1-merge6

into  big_geek.:C:/Work/mysql/mysql-5.1-test

into  siva.hindu.god:/usr/home/tim/m/51/a.bug6061

into  mysql.com:/home/psergey/mysql-5.1-merge6

into  mysql.com:/home/psergey/mysql-5.1-merge6