Log Message:
nsd: Update to 4.8.0

Changelog:
29 November 2023: Wouter
	- Tag for 4.8.0rc1.

28 November 2023: Wouter
	- Set up doc/RELNOTES for upcoming release.
	- Fix unit test kill_from_pidfile function for nonexistent files
	  because the argument is evaluated before the test expression.
	- Fix rr-test to also convert the contents of the just written output
	  file.
	- Fix test set to remove -f nsd.db and rm nsd.db commands.
	- Fix test set to remove difffile option.

27 November 2023: Jeroen
	- Fix #14: Set timeout to 3s when servicing remaining TCP connections.
	- Fix: Always instate write handler after reading queries from TCP.
	- Answer first query on connections accepted just before reload.

27 November 2023: Wouter
	- Merge #305: faster stats. Statistics can be gathered while a reload
	  is in progress.

27 November 2023: Willem
	- Merge #302: Test package fixes. Correct Auxfiles, kill_from_pidfile
	  function and fix drop_updates, rr-test and xfr_update tests.

1 November 2023: Jeroen
	- Remove on-disk database.

31 October 2023: Wouter
	- Merge #301: improve the logging of ixfr fallbacks to axfr.

30 October 2023: Jeroen
	- Fix processing of consolidated IXFRs.

30 October 2023: Wouter
	- Fix for interprocess communication to set quit sync command from
	  main process explicitly.

3 October 2023: Wouter
	- Merge #281: Proxy protocol. An implementation of PROXYv2 for NSD.
	  It can be configured with proxy-protocol-port: portnum with the
	  port number of the interface on which proxy traffic is handled.
	  The interface can support proxy traffic for UDP, TCP and TLS.

21 September 2023: Wouter
	- Merge #295: Update e-mail addresses, add ref to support contracts

31 August 2023: Wouter
	- Fix autoconf 2.69 warnings in configure.

14 July 2023: Wouter
	- Merge #287: Update nsd.conf.5.in.

11 July 2023: Wouter
	- Fix unused variable warning in unit test of udb.

22 June 2023: Wouter
	- Fix #284: dnstap_collector.c: SOCK_NONBLOCK is not available on
	  Mac/Darwin.

7 June 2023: Wouter
	- Merge #282: Improve nsd.conf man page.
	- Fix unused but set variable warning.
	- Fix #283: Compile failure in remote.c when --disable-bind8-stats
	  and --without-ssl are specified.