Log Message:
nsd: Update to 4.5.0

Changelog:
6 May 2022: Wouter
	- Merge #209: IXFR out
	  This adds IXFR out functionality to NSD. NSD can copy IXFRs from
	  upstream to downstream clients, or create IXFRs from zonefiles.
	  The options store-ixfr: yes and create-ixfr: yes can be used to
	  turn this on. Default is turned off. The options ixfr-number and
	  ixfr-size can be used to tune the number of IXFR transfers and
	  total data size stored. This is configured per zone, the IXFRs
	  are served to the hosts that are allowed to perform zone transfers.
	  And if TSIG is configured, signed with the same key. The content
	  is stored to file if a zonefile is configured for the zone, in
	  the zonefile.ixfr and zonefile.ixfr.2, .. files. They contain
	  readable text format. The number of IXFRs is num.rixfr in
	  statistics output, also per zone if per zone statistics are enabled.
	  If offline, nsd-checkzone -i can create ixfr files.
	  NSD already supports requesting IXFRs, this addition allows NSD
	  to serve IXFR transfers to clients.
	  NSD stops responding with NOTIMPL to IXFR requests, also for zones
	  that do not have IXFR enabled. The clients gets a full zone reply
	  or a status reply if the serial is up to date.
	- set version to 4.5.0 for feature change.
	- Tag for 4.5.0rc1 release. It became the 4.5.0 release on 13 May 2022.

14 April 2022: Wouter
	- Update cirrus script FreeBSD version.

25 March 2022: Wouter
	- Fix spelling error in comment in svcbparam_lookup_key.

2 March 2022: Wouter
	- Fix code analyzer zero divide warning.
	- Fix code analyzer large value with assertion.
	- Fix another code analyzer zero divide warning.
	- Fix code analyzer warning about uninitialized temp storage in loop.

10 February 2022: Wouter
	- Tag for 4.4.0rc1 release. This became 4.4.0 release on 17 Feb 2022,
	  the code repository continues with version 4.4.1.

9 February 2022: Wouter
	- Fix unit tests for nds-control-setup exit code and the
	  xfrd-tcp-max default.

7 February 2022: Wouter
	- Merge #207 Sync nsd-control-setup with unbound-control-setup to
	  generate certificates with SANs.

28 January 2022: Wouter
	- Fix #206: build with --without-ssl fails.

27 January 2022: Wouter
	- current code branch continues as version 4.4.0, because of added
	  feature.

26 January 2022: Wouter
	- Merge #193: Lower memory usage of the XFRD process by default.
	  Instead of preallocating all elements, they are allocated when used.
	  There are options for managing the memory usage, defaults are the
	  same as before. xfrd-tcp-max sets the number of sockets for tcp
	  connections that xfrd can make to download zone contents. And
	  xfrd-tcp-pipeline the number of simultaneous transfers over the
	  same connection.

12 January 2022: Wouter
	- Fix to document nsd-checkzone -p in the man page for nsd-checkzone.

7 January 2022: Wouter
	- Fix to change file mode before changing file owner for the
	  nsd-control unix socket file.

3 January 2022: Wouter
	- Merge #204 from jonathangray: correct some spelling mistakes.

15 December 2021: Wouter
	- Fix #200: nsd-checkzone succeeds even with incorrect serial in SOA
	  record.

2 December 2021: Wouter
	- Fix socket_partitioning unit test for FreeBSD.
	- Fix SVCB test to work around older dig with drill.
	- Fix unit test to not syslog setlogin failures.