This release enables some commonly used features by default, and introduces
experimental support for AF_XDP sockets that can be enabled with the
--enable-xdp feature flag (see https://nsd.docs.nlnetlabs.nl/en/latest/xdp.html).

4.13.0

FEATURES:

• Use '(all)' and '(none)' for the socket server affinity
  log output instead of '*' and '-'.
• The --enable-bind8-stats feature, was already enabled by default,
  is described as enabled by default in usage.
• The --enable-zone-stats feature is enabled by default. It can be
  turned on with config like zonestats: "%s".
• The --enable-ratelimit feature is enabled by default. The
  ratelimit value is off by default. It can be turned on with
  config like rrl-ratelimit: 200.
• The --enable-dnstap feature is enabled by default. If fstrm-devel
  or protobuf-c are not found by configure it prints an error.
  It can be turned on with config like dnstap-enable: yes.
• Change default for send-buffer-size to 4m, to mitigate a
  cross-layer issue where the UDP socket send buffers are
  exhausted waiting for ARP/NDP resolution. Thanks to Reflyable
  for the report.
• Disable TLSv1.2 if TLSv1.3 is available.
• Merge #449: Add useful logging for XoT transfers.
• Merge #425: Add experimental XDP (AF_XDP) support for UDP traffic
• Merge #455: --with-dbdir option for configure to set the base
  directory for the xfrd zone timer state file, the zone list file
  and the cookie secrets file. Thanks Simon Josefsson.
• Merge #456: Spelling fixes in metrics.c. Thanks Simon Josefsson.

BUG FIXES:

• Fix punctuation of nsd -h output for the -a option.
• Fix checkconf unit test for when metrics are not enabled.
• Prometheus metrics tests require --enable-zone-stats.
• Add unit test for socket server affinity log output.
• Move xfrd-tcp unit test to its own file.
• Fix contrib/nsd.spec to omit configure flags that are default or
  that do not exist.
• Fix to remove mention of obsolete root-server option.
• Fix mention of draft-rrtypes and root-server configure options.
• Fix ci workflow for enable dnstap.
• Fix to remove use of sprintf from metrics.
• Fix for fstrm and protobuf-c for ci workflow coverity-scan.
• Fix for parallel build of dnstap protoc-c output.
• Fix to remove unneeded mkdir from Makefile.
• Fix dnstap to use protoc and keep dnstap_config.h unchanged if
  possible.
• Fix to provide doc for --enable-systemd.
• Fix to remove debug printout for configure dnstap header.
• Fix #441: SystemD script for NSD prevents using chroot.
• Fix to add checks for compression pointers and too long dnames in
  internal dname routines, dname_make and ixfr dname_length.
• Fix to remove shell assignment operator from Makefile for DATE.
• make depend.
• Fix bitwise operators in conditional expressions with parentheses.
• Fix conditional expressions with parentheses for bitwise and.
• Merge #445: contrib/nsd.openrc.in: use supervise-daemon and
  add need net.
• Fix #446 nsd_size_db_in_mem_bytes (size.db.mem) metric not
  updated on reload.
• Merge #447: Minimize disruptions on reconfig.
• For #447: Updated simdzone to latest commit. With the padding
  test changes.
• For #447: use need_to_send_reload to detect if a reload is issued.
• For #447: acl_list_equal already tests for TSIG key changes, so
  removed the duplicate checks.
• For #447: log crypto error with the SSL_write error.
• Update simdzone with support for --enable-pie.
• Merge #454 from jaredmauch: handle rare case but seen in
  production where data->query is NULL.

simdzone 0.2.3

FEATURES:

• check_pie: match nsd support (#253).

BUG FIXES:

• Fix tests to initialize padding (#252).
• Fix for #253, add acx_nlnetlabs.m4 in the repo and allow CFLAGS passed to
  configure to set the flags.