Fix for bugfix #9728 merge

into moonbone.local:/work/mysql-4.1-bug-8147

  Fix for fix for bug#9728 decreased functionality in "on duplicate key update"
  Have to return false to set flag for whole expression.

into  mysql.com:/Users/emurphy/src/bk-clean/mysql-5.0

into  mysql.com:/Users/emurphy/src/bk-clean/mysql-5.0

  Bug#11481, set charset directory to mysqlbinlog

into  mysql.com:/Users/emurphy/src/bk-clean/mysql-5.0

into mysql.com:/Users/kent/mysql/bk/mysql-5.0

into  mysql.com:/Users/emurphy/src/bk-clean/mysql-5.0

into mysql.com:/home/psergey/mysql-5.0-bug8441

into  mysql.com:/Users/emurphy/src/bk-clean/mysql-5.0

into mysql.com:/home/psergey/mysql-5.0-bug8441

into mysql.com:/mnt/archive/svoj/mysql/mysql-5.0

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

into mysql.com:/opt/local/work/mysql-5.0-10736-new

into mysql.com:/home/svoj/devel/mysql/yassl-mysql-5.0

into mysql.com:/opt/local/work/mysql-5.0-10736-new

into mysql.com:/usr/local/home/marty/MySQL/mysql-4.1

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

into mysql.com:/usr/local/home/marty/MySQL/mysql-5.0

into mysql.com:/home/svoj/devel/mysql/yassl-mysql-5.0

Fix GCC 4.0 link failure.
Better CXX_VERSION guessing.

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

main_mem_root is moved out of class Query_arena.

Remove changes made by bug fix #8147. They strips list of insert_table_list to
only insert table, which results in error reported in bug #9728.
Added flag to Item to resolve ambigous fields reported in bug #8147.

into sanja.is.com.ua:/home/bell/mysql/bk/work-bug4-5.0