Log Message:
nsd: Update to 4.3.2

Changelog:
7 July 2020: Wouter
	- Tag for 4.3.2rc1.

6 July 2020: Wouter
	- Fix compile includes for xfr-inspect tool on FreeBSD.
	- Add tpkg/run_vm.sh that runs test when in a virtual machine.
	- Merge #112 from jaredmauch: log old and new serials when NSD
	  rejects an IXFR due to an old serial number.
	- Fix bug034 test for vm test changes.

22 June 2020: Wouter
	- Remove errno reset behaviour from sendmmsg and recvmmsg
	  replacement functions.
	- Fix unit test for different nsd-control-setup -h exit code.

19 June 2020: Wouter
	- Merge #108 from Nomis: Make the max-retry-time description clearer.
	- Retry when udp send buffer is full to wait until buffer space is
	  available.

18 June 2020: Wouter
	- Do not log EAGAIN errors for sendmmsg, to stop log spam on OpenBSD.

17 June 2020: Wouter
	- Fix #107: nsd -v shows configure line, openssl version and libevent version.

27 May 2020: Wouter
	- Fix unlink of pidfile warning if not possible due to permissions,
	  nsd can display the message at high verbosity levels.
	- Update contrib/nsd.service for chown of nsd.log and /var/log in
	  ReadWritePaths.
	- Removed contrib/nsd.service, example is too complicated and not
	  useful.

15 May 2020: Wouter
	- Merge PR#102 from and0x000: add missing default in documentation
	  for drop-updates.
	- Fix checkconf test for log-only-syslog option.

14 May 2020: Wouter
	- Document default value for tcp-timeout.

13 May 2020: Jeroen
	- Fix #99: Fix copying of socket properties with reuseport enabled.

24 April 2020: Wouter
	- Fix #97: EDNS unknown version: query not in response.

21 April 2020: Wouter
	- Fix #96: log-only-syslog: yes sets to only use syslog, fixes
	  that the default configuration and systemd results in duplicate
	  log messages.

20 April 2020: Wouter
	- Fix #95: Removed make test check because tpkg not included in
	  release tarballs.
	- Fix unused parameter compile warnings.