for the code.


Docs/manual.texi:
  - added SHOW OPEN TABLES
sql/gen_lex_hash.cc:
  - added SHOW OPEN TABLES
sql/lex.h:
  - added SHOW OPEN TABLES
sql/mysql_priv.h:
  - added SHOW OPEN TABLES
sql/sql_base.cc:
  - added SHOW OPEN TABLES
sql/sql_lex.h:
  - added SHOW OPEN TABLES
sql/sql_parse.cc:
  - added SHOW OPEN TABLES
sql/sql_show.cc:
  - added SHOW OPEN TABLES
sql/sql_yacc.yy:
  - added SHOW OPEN TABLES