"CONNECTION is a reserved keyword"
  Allow connection to be used as an ordinary identifier
  Tests included.


mysql-test/r/keywords.result:
  test that CONNECTION may be used as ordinary identifier
  test that CONNECTION may be used in stored procedure.
mysql-test/t/keywords.test:
  test that CONNECTION may be used as ordinary identifier
  test that CONNECTION may be used in stored procedure.
sql/sql_yacc.yy:
  Set CONNECTION as an unreserved keyword