Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1-new

into  a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-5.1-new-merge_060509


configure.in:
  Auto merged
mysql-test/r/rpl_user_variables.result:
  Auto merged
mysql-test/t/having.test:
  Auto merged
mysql-test/t/rpl_user_variables.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_prepare.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged