IN and CONVERT_TZ()" (with after review changes).

Now we add implicitly used time zone tables to global table list right
at the parsing stage instead of doing it later in mysql_execute_command()
or in check_prepared_statement().

No special test-case needed since this bug also manifests itself as
timezone2.test failure if one runs it with --ps-protocol option.

  don't make non-debug builds fail the testsuite

into mysql.com:/home/cps/mysql/trees/autofail/mysql-5.0

Added comments (from code review on pull)

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

into gluh.mysql.r18.ru:/home/gluh/MySQL/mysql-5.0.n

into hundin.mysql.fi:/home/marko/j/mysql-5.0

operations.

mysqldump skips information_schema db
'use' now can use information_schema db
changed value of column 'Null' to 'NO' if column is not nullable

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

  explicit setting of reconnect (no behaviour change)

into mysql.com:/home/mysql_src/mysql-5.0-clean

into mysql.com:/home/mysql_src/mysql-5.0-clean

into hundin.mysql.fi:/home/marko/j/mysql-5.0

All our programs which use mysql_real_connect() and mysql_connect() are updated accordingly, though I have deliberately
made mysqlimport not reconnect anymore (already true for mysqldump >= 4.1.8).
All Connector devs have been warned about the change I'm doing here - which was agreed with Monty,
and fixes BUG#2555.

memory heaps.  This changeset plugs also a few memory leaks that
were introduced with the compact InnoDB table format.

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

into mysql.com:/home/cps/mysql/devel/im/mysql-5.0-im

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

into mysql.com:/home/mydev/mysql-5.0-5000

When the joins were not cleaned up before the tables
were closed, a JOIN_TAB still held a pointer to a
meanwhile closed table and tried to close it again
during item cleanup...

record format without requiring the doubly linked list added by
Heikki in ChangeSet@1.1627.16.2

  Remove parameter from call to btr_search_validate().
buf0buf.c:
  Initialize member "index" of buf_block_t.
buf0buf.h:
  Add member "index" to buf_block_t.
btr0sea.h:
  Remove parameter of btr_search_validate()
btr0sea.c:
  Make use of the added member "index" of buf_block_t.

- CREATE TABLE t1 SELECT BINARY 'literal'
  now creates a VARBINARY() column, not a BINARY().

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