Summary of functional enhancements from prior major releases of BIND 9:
+BIND 9.9.0
+
+ BIND 9.9.0 includes a number of changes from BIND 9.8 and earlier
+ releases. New features include:
+
+ - Inline signing, allowing automatic DNSSEC signing of
+ master zones without modification of the zonefile, or
+ "bump in the wire" signing in slaves.
+ - NXDOMAIN redirection.
+ - New 'rndc flushtree' command clears all data under a given
+ name from the DNS cache.
+ - New 'rndc sync' command dumps pending changes in a dynamic
+ zone to disk without a freeze/thaw cycle.
+ - New 'rndc signing' command displays or clears signing status
+ records in 'auto-dnssec' zones.
+ - NSEC3 parameters for 'auto-dnssec' zones can now be set prior
+ to signing, eliminating the need to initially sign with NSEC.
+ - Startup time improvements on large authoritative servers.
+ - Slave zones are now saved in raw format by default.
+ - Several improvements to response policy zones (RPZ).
+ - Improved hardware scalability by using multiple threads
+ to listen for queries and using finer-grained client locking
+ - The 'also-notify' option now takes the same syntax as
+ 'masters', so it can used named masterlists and TSIG keys.
+ - 'dnssec-signzone -D' writes an output file containing only DNSSEC
+ data, which can be included by the primary zone file.
+ - 'dnssec-signzone -R' forces removal of signatures that are
+ not expired but were created by a key which no longer exists.
+ - 'dnssec-signzone -X' allows a separate expiration date to
+ be specified for DNSKEY signatures from other signatures.
+ - New '-L' option to dnssec-keygen, dnssec-settime, and
+ dnssec-keyfromlabel sets the default TTL for the key.
+ - dnssec-dsfromkey now supports reading from standard input,
+ to make it easier to convert DNSKEY to DS.
+ - RFC 1918 reverse zones have been added to the empty-zones
+ table per RFC 6303.
+ - Dynamic updates can now optionally set the zone's SOA serial
+ number to the current UNIX time.
+ - DLZ modules can now retrieve the source IP address of
+ the querying client.
+ - 'request-ixfr' option can now be set at the per-zone level.
+ - 'dig +rrcomments' turns on comments about DNSKEY records,
+ indicating their key ID, algorithm and function
+ - Simplified nsupdate syntax and added readline support
+
BIND 9.8.0
BIND 9.8.0 includes a number of changes from BIND 9.7 and earlier