Log Message:
Update to 4.1.19

Changelog:
NSD 4.1.19
Dec 11, 2017

Bugfixes

  * ignore fallthrough compiler warning in flex EOF rule.
  * Fix warnings emitted by clang for --enable-packed. Alignment is
    not a problem for x86_64, don't enable packed when the platform
    requires aligned access.
  * Fix spelling error in xfr-inspect.
  * Fix 3392: Fix regression in 4.1.18 for notify lists with ip4 and ip6
    targets.
  * Add test for support of -Wno-address-of-packed-member for --enable-packed.

NSD 4.1.18
Nov 30, 2017
Features

  * xfr-inspect, it is not installed, it prints xfr files from /tmp made
    with 'make xfr-inspect' in the source dir.
  * retry timeout between sending notifies dropped from 15 to 3 sec.
  * NSD sends 16 notifies simultaneously.
  * configure --enable-packed reduces memory usage, at expense of unaligned
    reads. Saves about 17%.
  * Save memory by selectively allocate precompiled nsec3 hashes, saves
    about 16% memory.
  * make ip-transparent option work on OpenBSD.
  * Save about 2% memory by changing usage count size in name tree.
  * Fix #2871: Increase number of sockets for xfrd transfers.

Bugfixes

  * Fix gcc 7.1.1 warnings.
  * Fix writev compile warning on FreeBSD.
  * Fix #1446: A corrupted zone file "propagates" to good ones.
  * nsd-control zonestatus prints wait time between attempts, for zones
    that are in that waiting time.
  * Fix collision printout of nsec3 to print name, hash and reverse.
  * Fix #1567: Change crit to err log level for gettimeofday failure.
    Add defines for compile without syslog.
  * Fix crash for DS query when parent and child zones both configured
    in nsd.conf and parent zone has not loaded properly.