Fixed bug in multi-table-delete


Docs/manual.texi:
  Changelog
include/mysql_com.h:
  Define MAX_CHAR_WIDTH
myisam/mi_extra.c:
  Cleanup
mysql-test/r/bdb.result:
  Bug test
mysql-test/r/group_by.result:
  Bug test
mysql-test/t/bdb.test:
  Bug test
mysql-test/t/group_by.test:
  Bug test
sql/ha_berkeley.cc:
  More debug statements
sql/handler.cc:
  Move HA_EXTRA_NO_READCHECK to ha_open
sql/records.cc:
  More DBUG statements
sql/sql_analyse.cc:
  Cleanup
sql/sql_base.cc:
  Move HA_EXTRA_NO_READCHECK to ha_open
sql/sql_delete.cc:
  Fixed bug in multi-table-delete
  Cleanup
sql/sql_select.cc:
  Move HA_EXTRA_NO_READCHECK to ha_open
sql/sql_update.cc:
  Move HA_EXTRA_NO_READCHECK to ha_open