For details for 9.16.35 and 9.16.34 (we skipped the last) see:
https://downloads.isc.org/isc/bind9/9.16.35/doc/arm/html/notes.html#notes-for-bind-9-16-35
"Notes for BIND 9.16.35
Bug Fixes
A crash was fixed that happened when a dnssec-policy zone that used
NSEC3 was reconfigured to enable inline-signing. [GL #3591]
In certain resolution scenarios, quotas could be erroneously reached
for servers, including any configured forwarders, resulting in SERVFAIL
answers being sent to clients. This has been fixed. [GL #3598]
rpz-ip rules in response-policy zones could be ineffective in some
cases if a query had the CD (Checking Disabled) bit set to 1. This has
been fixed. [GL #3247]
Previously, if Internet connectivity issues were experienced during the
initial startup of named, a BIND resolver with dnssec-validation set to
auto could enter into a state where it would not recover without
stopping named, manually deleting the managed-keys.bind and
managed-keys.bind.jnl files, and starting named again. This has been
fixed. [GL #2895]
The statistics counter representing the current number of clients
awaiting recursive resolution results (RecursClients) could overflow in
certain resolution scenarios. This has been fixed. [GL #3584]
Previously, BIND failed to start on Solaris-based systems with hundreds
of CPUs. This has been fixed. [GL #3563]
When a DNS resource record’s TTL value was equal to the resolver’s
configured prefetch “eligibility” value, the record was erroneously not
treated as eligible for prefetching. This has been fixed. [GL #3603]
...
Notes for BIND 9.16.34
Bug Fixes
Changing just the TSIG key names for primaries in catalog zones’ member
zones was not effective. This has been fixed. [GL #3557]"
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org> Reviewed-by: Peter Müller <peter.mueller@ipfire.org>