Finalize storage engine plugins

Give BerkeleyDB savepoints
Remove "enum db_type" from most of the code


storage/example/ha_example.h:
  Rename: sql/examples/ha_example.h -> storage/example/ha_example.h
storage/csv/ha_tina.h:
  Rename: sql/examples/ha_tina.h -> storage/csv/ha_tina.h
config/ac-macros/storage.m4:
  if hton name is "no", then we don't install it as a builtin
configure.in:
  pluggable changes
include/plugin.h:
  version field
mysql-test/r/bdb.result:
  savepoint results copied from innodb test
mysql-test/r/information_schema.result:
  PLUGINS information schema
mysql-test/r/information_schema_db.result:
  PLUGINS information schema
mysql-test/t/bdb.test:
  savepoint test copied from innodb test
sql/Makefile.am:
  tina and example are not here anymore
sql/authors.h:
  minor tweek
sql/ha_archive.cc:
  remove unwanted handlerton entries
sql/ha_berkeley.cc:
  remove unwanted handlerton entries
  support for savepoints
  changes to show logs
sql/ha_blackhole.cc:
  remove unwanted handlerton entries
sql/ha_federated.cc:
  remove unwanted handlerton entries
sql/ha_heap.cc:
  remove unwanted handlerton entries
sql/ha_innodb.cc:
  remove unwanted handlerton entries
  changes for show status
sql/ha_myisam.cc:
  remove unwanted handlerton entries
sql/ha_myisammrg.cc:
  remove unwanted handlerton entries
sql/ha_ndbcluster.cc:
  remove unwanted handlerton entries
  changes to stat_print
sql/ha_partition.cc:
  remove unwanted handlerton entries
  bye bye enum db_type
sql/ha_partition.h:
  bye bye enum db_type
sql/handler.cc:
  remove unwanted handlerton entries
  bye bye enum db_type
sql/handler.h:
  remove unwanted handlerton entries
  bye bye enum db_type
  changes to stat_print_fn
sql/item_sum.cc:
  bye bye enum db_type
sql/log.cc:
  remove unwanted handlerton entries
sql/mysql_priv.h:
  bye bye enum db_type
sql/mysqld.cc:
  bye bye enum db_type
  reorder plugin initialization
sql/set_var.cc:
  bye bye enum db_type
sql/set_var.h:
  bye bye enum db_type
sql/sql_base.cc:
  bye bye enum db_type
sql/sql_cache.cc:
  bye bye enum db_type
sql/sql_class.h:
  bye bye enum db_type
sql/sql_delete.cc:
  bye bye enum db_type
sql/sql_insert.cc:
  bye bye enum db_type
sql/sql_lex.h:
  show plugin
sql/sql_parse.cc:
  bye bye enum db_type
sql/sql_partition.cc:
  bye bye enum db_type
sql/sql_plugin.cc:
  loadable storage engines
sql/sql_plugin.h:
  loadable storage engines
sql/sql_rename.cc:
  bye bye enum db_type
sql/sql_select.cc:
  bye bye enum db_type
sql/sql_show.cc:
  SHOW PLUGIN
  PLUGINS information schema
  changes to show engines
sql/sql_table.cc:
  bye bye enum db_type
sql/sql_view.cc:
  bye bye enum db_type
sql/sql_view.h:
  bye bye enum db_type
sql/sql_yacc.yy:
  bye bye enum db_type
sql/table.cc:
  bye bye enum db_type
sql/table.h:
  bye bye enum db_type
sql/unireg.cc:
  bye bye enum db_type
storage/csv/ha_tina.cc:
  make tina into a loadable plugin
storage/example/ha_example.cc:
  make into a plugin
storage/csv/Makefile.am:
  New BitKeeper file ``storage/csv/Makefile.am''
storage/example/Makefile.am:
  New BitKeeper file ``storage/example/Makefile.am''

include/plugin.h

@@ -51,6 +51,7 @@ struct st_mysql_plugin
   int type;             /* the plugin type (a MYSQL_XXX_PLUGIN value)   */
   void *info;           /* pointer to type-specific plugin descriptor   */
   const char *name;     /* plugin name                                  */
+  uint version;         /* plugin version                               */
   const char *author;   /* plugin author (for SHOW PLUGINS)             */
   const char *descr;    /* general descriptive text (for SHOW PLUGINS ) */
   int (*init)(void);    /* the function to invoke when plugin is loaded */