Scrum task !!!!!


mysql-test/r/analyse.result:
  reverting a fix
mysql-test/r/derived.result:
  derived tables with UNION's ...
mysql-test/t/analyse.test:
  reverting a fix
mysql-test/t/derived.test:
  derived tables with UNION's ...
sql/mysql_priv.h:
  derived tables with UNION's ...
sql/sql_analyse.cc:
  reverting a fix
sql/sql_derived.cc:
  derived tables with UNION's ...
sql/sql_lex.cc:
  derived tables with UNION's ...
sql/sql_select.cc:
  derived tables with UNION's ...
sql/sql_union.cc:
  derived tables with UNION's ...