into  dl145s.mysql.com:/users/mhansson/mysql/push/bug23856/mysql-5.1o-pushee


sql/item_sum.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/func_gconcat.result:
  Bug#23856: Manually merged test case.
mysql-test/t/func_gconcat.test:
  Bug#23856: Manually merged test case.