and possibly server crash in mysqld v5.0.

Reported MyISAM table was created in mysqld 4.1 and contains varchar field.
When binary files of that table was moved to 5.0, mysqld treats that varchar 
field as a string field. 
In order to make grouping server calculates group buffer, and because
that field is string server assumes it has fixed length and doesn't add
space for length, but later that field is converted to varchar field. 
Due to this, when field values were actually copied, additional space for
length bytes is taken and buffer overrun occurs, which may lead to server crash.

The calc_group_buffer() function now reserves additional space for length
bytes for VAR_STRING fields, like for VARCHAR fields.

into  mysql.com:/home/alexi/innodb/mysql-5.0-ss162

  Applied innodb-5.0-ss149/162 snapshots.

into  devsrv-b.mysql.com:/space/magnus/my50-bug15302

into  mysql.com:/usr/local/mysql/mysql-5.0

into  devsrv-b.mysql.com:/space/magnus/my50-bug15302

into  mysql.com:/home/dlenev/src/mysql-5.0-bg16829

into  neptunus.(none):/home/msvensson/mysql/bug15302/my50-bug15302

into  mysql.com:/extern/mysql/work/bug15737/mysql-5.0

 - Change "mysql_create_db" to not call "send_ok" if in silent mode i.e. called from "load_master_data"
 - Change mysqltest to detect when there aren't as many warnings available as was reported.

into  mysql.com:/home/dlenev/src/mysql-5.0-bg16829

Add / to std_data in ln command

into  mysql.com:/extern/mysql/work/bug15737/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

 - Use "../tmp" as --slave-load-tmpdir. Same as in mysql-test-run.pl

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.0

into  mysql.com:/home/alexi/innodb/mysql-5.0-ss20

  Applied innodb-4.1-ss20 snapshot.

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.0

into  mysql.com:/extern/mysql/work/bug15737/mysql-5.0

into  mysql.com:/extern/mysql/work/bug15737/mysql-5.0

into  selena.:H:/MYSQL/src/#15634-mysql-5.0

into  mysql.com:/home/alexi/innodb/mysql-5.0-ss17

into  mysql.com:/home/alexi/innodb/mysql-5.0-ss17

  Applied innodb-4.1-ss17 snapshot.
  Do not mistake TABLENAME_ibfk_0 for auto-generated id.

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration

  Fix test result.
table.h, sql_show.cc:
  Put I_S tables in lexical order.

We should disallow usage of RETURN statement in triggers and emit
error at parsing time (instead of crashing when trigger is fired).

The problem has manifested itself in the cases when we have a nested outer join
for which it can be inferred that one of the inner tables is a single row table.

Added fixes to make last_insert_id() to work.

into  neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration

Merge neptunus.(none):/home/msvensson/mysql/mysqltestrun_check_testcases/my50-mysqltestrun_check_testcases
into  neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration

Cleanup the sideeffects from most of the  testcases with sideeffects.

into  neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration

into  neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration