changes from the 9.6.1rc1 version. The first 2 only affect DNSSEC.
named could incorrectly delete NSEC3 records for
empty nodes when processing a update request.
Accept DS responses from delegation only zones.
"delegation-only" was not being accepted in
delegation-only type zones.
lots of new features compared to 9.4.x, including:
Full NSEC3 support
Automatic zone re-signing
New update-policy methods tcp-self and 6to4-self
DHCID support.
More detailed statistics counters including those supported in BIND 8.
Faster ACL processing.
Efficient LRU cache-cleaning mechanism.
NSID support.