Unbound 1.17.1rc1 pre-release

[Wouter Wijngaards]

Hi,

Unbound 1.17.1rc1 pre-release is available:
https://nlnetlabs.nl/downloads/unbound/unbound-1.17.1rc1.tar.gz
sha256 4686cd98222cd7580606a07f4f20c15d531634e1ae34e9dad767e4e12609b61f
pgp https://nlnetlabs.nl/downloads/unbound/unbound-1.17.1rc1.tar.gz.asc

This release fixes a number of bugs. There are also new configuration
options that by default do not change the existing behaviour of Unbound.

With `statistics-inhibit-zero` the printout of zero values by stats can
be controlled. Similarly with `max-sent-count` and `max-query-restarts`
the iterator behaviour can be controlled. The maximum CNAME chain length
that is accepted can be changed by increasing the `max-query-restarts`
number. This takes more time to follow those elements.

The keep-cache option allows reloads to change configuration whilst
keeping the cache memory intact, making the cache hot for good response
times after the change has completed.

Features
- Expose 'statistics-inhibit-zero' as a configuration option; the
   default value retains Unbound's behavior.
- Expose 'max-sent-count' as a configuration option; the
   default value retains Unbound's behavior.
- Merge #461 from Christian Allred: Add max-query-restarts option.
   Exposes an internal configuration but the default value retains
   Unbound's behavior.
- Merge #569 from JINMEI Tatuya: add keep-cache option to
   'unbound-control reload' to keep caches.

Bug Fixes
- Merge #768 from fobser: Arithmetic on a pointer to void is a GNU
   extension.
- In unit test, print python script name list correctly.
- testcode/dohclient sets log identity to its name.
- Clarify the use of MAX_SENT_COUNT in the iterator code.
- Fix that cachedb does not store failures in the external cache.
- Merge #767 from jonathangray: consistently use IPv4/IPv6 in
   unbound.conf.5.
- Fix to ignore tcp events for closed comm points.
- Fix to make sure to not read again after a tcp comm point is closed.
- Fix #775: libunbound: subprocess reap causes parent process reap
   to hang.
- iana portlist update.
- Complementary fix for distutils.sysconfig deprecation in Python 3.10
   to commit 62c5039ab9da42713e006e840b7578e01d66e7f2.
- Fix #779: [doc] Missing documention in ub_resolve_event() for
   callback parameter was_ratelimited.
- Ignore expired error responses.
- Merge #720 from jonathangray: fix use after free when
   WSACreateEvent() fails.
- Fix for the ignore of tcp events for closed comm points, preserve
   the use after free protection features.
- Fix #782: Segmentation fault in stats.c:404.
- Add SVCB and HTTPS to the types removed by 'unbound-control flush'.
- Clear documentation for interactivity between the subnet module and
   the serve-expired and prefetch configuration options.
- Fix #773: When used with systemd-networkd, unbound does not start
   until systemd-networkd-wait-online.service times out.
- Merge #808: Wrap Makefile script's directory variables in quotes.
- Fix to wrap Makefile scripts directory in quotes for uninstall.
- Fix windows compile for libunbound subprocess reap comm point closes.
- Update github workflows to use checkout v3.

Best regards, Wouter