Merge r1402907,1406088:

    If out of mem, abort instead of crashing. Use the pool's abort function
    if it has one.

    Make sure we abort, even if the abortfunc returns


git-svn-id: https://svn.apache.org/repos/asf/apr/apr-util/branches/1.5.x@1460344 13f79535-47bb-0310-9956-ffa450edef68