Fixed problems with group_concat() and HAVING
Updated crash-me values


sql-bench/limits/mysql-4.0.cfg:
  Rename: sql-bench/limits/mysql.cfg -> sql-bench/limits/mysql-4.0.cfg
include/my_global.h:
  Safety fix
libmysqld/Makefile.am:
  Portability fix (For AIX 64 bit)
mysql-test/r/func_gconcat.result:
  More tests
mysql-test/t/func_gconcat.test:
  More tests
sql/field.cc:
  Cleanups
sql/init.cc:
  moved thread_stack_min to right place
sql/item_sum.cc:
  Fixed problems with group_concat() and HAVING
  Removed some not needed variables
sql/item_sum.h:
  Fixed problems with group_concat() and HAVING
  Removed some not needed variables
sql/mysqld.cc:
  Moved thread_stack_min to right place to handle case where we didn't get as much stack space as we asked for
sql/sql_parse.cc:
  More debugging
sql/sql_select.cc:
  Cleanup
sql/sql_yacc.yy:
  Fixed handling of Item_group_concat() in having. (Arguments should not be handled as refs)