Merge r1127053, add CHANGES:

    Fix memory leak in hook sorting function

    PR: 51256
    Submitted by: <horowity checkpoint com>


git-svn-id: https://svn.apache.org/repos/asf/apr/apr-util/branches/1.5.x@1460366 13f79535-47bb-0310-9956-ffa450edef68