"t.key BETWEEN c1 AND c2" and c1 = c2 -> can access table t using "t.key = c1".


mysql-test/r/heap.result:
  BUG#13455: updated test results
mysql-test/r/innodb.result:
  BUG#13455: updated test results
mysql-test/r/myisam.result:
  BUG#13455: updated test results
mysql-test/r/range.result:
  Testcase for BUG#13455
mysql-test/t/range.test:
  Testcase for BUG#13455