Update to 2.89 (#2167121)
    
    Fix bug introduced in 2.88 (commit fe91134b) which can result
    in corruption of the DNS cache internal data structures and
    logging of "cache internal error". This has only been seen
    in one place in the wild, and it took considerable effort
    to even generate a test case to reproduce it, but there's
    no way to be sure it won't strike, and the effect is to break
    the cache badly. Installations with DNSSEC enabled are more
    likely to see the problem, but not running DNSSEC does not
    guarantee that it won't happen. Thanks to Timo van Roermund
    for reporting the bug and for his great efforts in chasing
    it down.
    
    Also --no-ident option to disable CHAOS entries.