Log Message:
nsd: Update to 4.3.4

24 November 2020: Wouter
	- Merge PR #141: ZONEMD RR type.
	- tag for 4.3.4rc1.

23 November 2020: Wouter
	- Fix #142: NODATA answers missin SOA in authority section after
	  CNAME chain.
	- Fix for CVE-2020-28935 : Fix that symlink does not interfere
	  with chown of pidfile.
	- fix writepid for retvalue 0.

9 November 2020: Wouter
	- Fix #138: NSD returns non-EDNS answer when QUESTION is empty.
	- Fix to check nscount in previous fix for EDNS in formerr response
	  when there is no question.

28 October 2020: Wouter
	- Remove unused init_cfg_parse routine from configlexer.

20 October 2020: Wouter
	- Fix to add missing closest encloser NSEC3 for wildcard nodata type
	  DS answer.

14 October 2020: Wouter
	- Fix #134: IPV4_MINIMAL_RESPONSE_SIZE vs EDNS_MAX_MESSAGE_LEN.

13 October 2020: Wouter
	- Fix missing parenthesis on size of fix to init buffer.

12 October 2020: Wouter
	- Fix #127: two minor `-Wcast-qual` cleanups
	- Fix #126: minor header hygiene
	- Fix #125: include config.h in compat/setproctitle.c and fix prototype of \ 
`setproctitle`
	- Fix #133: fix 0-init of local ( stack ) buffer.