path: root/NEWS

Knot DNS 2.7.6 (2019-01-23)
===========================

Improvements:
-------------
 - Zone status also shows when the zone load is scheduled
 - Server workers status also shows background workers utilization
 - Default control timeout for knotc was increased to 10 seconds
 - Pkg-config files contain auxiliary variable with library filename

Bugfixes:
---------
 - Configuration commit or server reload can drop some pending zone events
 - Nonempty zone journal is created even though it's disabled #635
 - Zone is completely re-signed during empty dynamic update processing
 - Server can crash when storing a big zone difference to the journal
 - Failed to link on FreeBSD 12 with Clang

Knot DNS 2.7.5 (2019-01-07)
===========================

Features:
---------
 - Keymgr supports NSEC3 salt handling

Improvements:
-------------
 - Zone history in journal is dropped apon AXFR-like zone update
 - Libdnssec is no longer linked against libm #628
 - Libdnssec is explicitly linked against libpthread if PKCS #11 enabled #629
 - Better support for libknot packaging in Python
 - Manually generated KSK is 'ready' by default
 - Kdig supports '+timeout' as an alias for '+time'
 - Kdig supports '+nocomments' option
 - Kdig no longer prints empty lines between retries
 - Kdig returns failure if operations not successfully resolved #632
 - Fixed repeating of the 'KSK submission, waiting for confirmation' log
 - Various improvements in documentation, Dockerfile, and tests

Bugfixes:
---------
 - Knotc fails to unset huge configuration section
 - Kjournalprint sometimes fails to display zone journal content
 - Improper timing of ZSK removal during ZSK rollover
 - Missing UTC time zone indication in the 'iso' keymgr list output
 - A race condition in the online signing module

Knot DNS 2.7.4 (2018-11-13)
===========================

Features:
---------
 - Added SNI configuration for TLS in kdig (Thanks to Alexander Schultz)

Improvements:
-------------
 - Added warning log when DNSSEC events not successfully scheduled
 - New semantic check on timer values in keymgr
 - DS query no longer asks other addresses if got a negative answer
 - Reintroduced 'rollover' configuration option for CDS/CDNSKEY publication
 - Extended logging for zone loading
 - Various documentation improvements

Bugfixes:
---------
 - Failed to import module configuration #613
 - Improper Cflags value in libknot.pc if built with embedded LMDB #615
 - IXFR doesn't fall back to AXFR if malformed reply
 - DNSSEC events not correctly scheduled for empty zone updates
 - During algorithm rollover old keys get removed before DS TTL expires #617
 - Maximum zone's RRSIG TTL not considered during algorithm rollover #620

Knot DNS 2.7.3 (2018-10-11)
===========================

Features:
---------
 - New queryacl module for query access control
 - Configurable answer rrset rotation #612
 - Configurable NSEC bitmap in online signing

Improvements:
-------------
 - Better error logging for KASP DB operations #601
 - Some documentation improvements

Bugfixes:
---------
 - Keymgr "list" output doesn't show key size for ECDSA algorithms #602
 - Failed to link statically with embedded LMDB
 - Configuration commit causes zone reload for all zones
 - The statistics module overlooks TSIG record in a request
 - Improper processing of an AXFR-style-IXFR response consisting of one-record messages
 - Race condition in online signing during key rollover #600
 - Server can crash if geoip module is enabled in the geo mode

Knot DNS 2.7.2 (2018-08-29)
===========================

Improvements:
-------------
 - Keymgr list command displays also key size
 - Kjournalprint displays total occupied size in the debug mode
 - Server doesn't stop if failed to load a shared module from the module directory
 - Libraries libcap-ng, pthread, and dl are linked selectively if needed

Bugfixes:
---------
 - Sometimes incorrect result from dnssec_nsec_bitmap_contains (libdnssec)
 - Server can crash when loading zone file difference and zone-in-journal is set
 - Incorrect treatment of specific queries in the module RRL
 - Failed to link module Cookies as a shared library

Knot DNS 2.7.1 (2018-08-14)
===========================

Improvements:
-------------
 - Added zone wire size information to zone loading log message
 - Added debug log message for each unsuccessful remote address operation
 - Various improvements for packaging

Bugfixes:
---------
 - Incompatible handling of RRSIG TTL value when creating a DNS message
 - Incorrect RRSIG TTL value in zone differences and knotc zone operation outputs
 - Default configure prefix is ignored

Knot DNS 2.7.0 (2018-08-03)
===========================

Features:
---------
 - New DNS Cookies module and related '+cookie' kdig option
 - New module for response tailoring according to client's subnet or geographic location
 - General EDNS Client Subnet support in the server
 - OSS-Fuzz integration (Thanks to Jonathan Foote)
 - New '+ednsopt' kdig option (Thanks to Jan Včelák)
 - Online Signing support for automatic key rollover
 - Non-normal file (e.g. pipe) loading support in zscanner #542
 - Automatic SOA serial incrementation if non-empty zone difference
 - New zone file load option for ignoring zone file's SOA serial
 - New build-time option for alternative malloc specification
 - Structured logging for DNSSEC key submission event
 - Empty QNAME support in kdig

Improvements:
-------------
 - Various library and server optimizations
 - Reduced memory consumption of outgoing IXFR processing
 - Linux capabilities use overhaul #546 (Thanks to Robert Edmonds)
 - Online Signing properly signs delegations and CNAME records
 - CDS/CDNSKEY rrset is signed with KSK instead of ZSK
 - DNSSEC-related records are ignored when loading zone difference with signing enabled
 - Minimum allowed RSA key length was increased to 1024
 - Removed explicit dependency on Nettle

Bugfixes:
---------
 - Possible uninitialized address buffer use in zscanner
 - Possible index overflow during multiline record parsing in zscanner
 - kdig +tls sometimes consumes 100 % CPU #561
 - Single-Type Signing doesn't work with single ZSK key #566
 - Zone not flushed after re-signing during zone load #594
 - Server crashes when committing empty zone transaction
 - Incoming IXFR with on-slave signing sometimes leads to memory corruption #595

Compatibility:
--------------
 - Removed obsolete RRL configuration
 - Removed obsolete module names 'mod-online-sign' and 'mod-synth-record'
 - Removed obsolete 'ixfr-from-differences' configuration option
 - Removed old journal migration
 - Removed module rosedb

Knot DNS 2.6.9 (2018-08-14)
===========================

Improvements:
-------------
 - Added zone wire size to zone loading log message
 - Added debug log message for each unsuccessful remote address operation

Bugfixes:
---------
 - Zone not flushed after re-signing during zone load #594
 - Server crashes when committing empty zone transaction
 - Incoming IXFR with on-slave signing sometimes leads to memory corruption #595

Knot DNS 2.6.8 (2018-07-10)
===========================

Features:
---------
 - New 'import-pkcs11' command in keymgr

Improvements:
-------------
 - Unixtime serial policy mimics Bind – increment if lower #593

Bugfixes:
---------
 - Creeping memory consuption upon server reload #584
 - Kdig incorrectly detects QNAME if 'notify' is a prefix
 - Server crashes when zone sign fails #587
 - CSK->KZSK rollover retires CSK early #588
 - Server crashes when zone expires during outgoing multi-message transfer
 - Kjournalprint doesn't convert zone name argument to lower-case
 - Cannot switch to a previously used ksk-shared dnssec policy #589

Knot DNS 2.6.7 (2018-05-17)
===========================

Features:
---------
 - Added 'dateserial' (YYYYMMDDnn) serial policy configuration (Thanks to Wolfgang Jung)

Improvements:
-------------
 - Trailing data indication from the packet parser (libknot)
 - Better configuration check for a problematical option combination

Bugfixes:
---------
 - Incomplete configuration option item name check
 - Possible buffer overflow in 'knot_dname_to_str' (libknot)
 - Module dnsproxy doesn't preserve letter case of QNAME
 - Module dnsproxy duplicates OPT and TSIG in the non-fallback mode

Knot DNS 2.6.6 (2018-04-11)
===========================

Features:
---------
 - New EDNS option counters in the statistics module
 - New '+orphan' filter for the 'zone-purge' operation

Improvements:
-------------
 - Reduced memory consuption of disabled statistics metrics
 - Some spelling fixes (Thanks to Daniel Kahn Gillmor)
 - Server no longer fails to start if MODULE_DIR doesn't exist
 - Configuration include doesn't fail if empty wildcard match
 - Added a configuration check for a problematical option combination

Bugfixes:
---------
 - NSEC3 chain not re-created when SOA minimum TTL changed
 - Failed to start server if no template is configured
 - Possibly incorrect SOA serial upon changed zone reload with DNSSEC signing
 - Inaccurate outgoing zone transfer size in the log message
 - Invalid dname compression if empty question section
 - Missing EDNS in EMALF responses

Knot DNS 2.6.5 (2018-02-12)
===========================

Features:
---------
 - New 'zone-notify' command in knotc
 - Kdig uses '@server' as a hostname for TLS authenticaion if '+tls-ca' is set

Improvements:
-------------
 - Better heap memory trimming for zone operations
 - Added proper polling for TLS operations in kdig
 - Configuration export uses stdout as a default output
 - Simplified detection of atomic operations
 - Added '--disable-modules' configure option
 - Small documentation updates

Bugfixes:
---------
 - Zone retransfer doesn't work well if more masters configured
 - Kdig can leak or double free memory in corner cases
 - Inconsistent error outputs from dynamic configuration operations
 - Failed to generate documentation on OpenBSD

Knot DNS 2.6.4 (2018-01-02)
===========================

Features:
---------
 - Module synthrecord allows multiple 'network' specification
 - New CSK handling support in keymgr

Improvements:
-------------
 - Allowed configuration for infinite zsk lifetime
 - Increased performance and security of the module synthrecord
 - Signing changeset is stored into journal even if 'zonefile-load' is whole

Bugfixes:
---------
 - Unintentional zone re-sign during reload if empty NSEC3 salt
 - Inconsistent zone names in journald structured logs
 - Malformed outgoing transfer for big zone with TSIG
 - Some minor DNSSEC-related issues

Knot DNS 2.6.3 (2017-11-24)
===========================

Bugfixes:
---------
 - Wrong detection of signing scheme rollover

Knot DNS 2.6.2 (2017-11-23)
===========================

Features:
---------
 - CSK algorithm rollover and (KSK, ZSK) <-> CSK rollover support

Improvements:
-------------
 - Allowed explicit configuration for infinite ksk lifetime
 - Proper error messages instead of unclear error codes in server log
 - Better support for old compilers

Bugfixes:
---------
 - Unexpected reply for DS query with an owner below a delegation point
 - Old dependencies in the pkg-config file

Knot DNS 2.6.1 (2017-11-02)
===========================

Features:
---------
 - NSEC3 Opt-Out support in the DNSSEC signing
 - New CDS/CDNSKEY publish configuration option

Improvements:
-------------
 - Simplified DNSSEC log message with DNSKEY details
 - +tls-hostname in kdig implies +tls-ca if neither +tls-ca nor +tls-pin is given
 - New documentation sections for DNSSEC key rollovers and shared keys
 - Keymgr no longer prints useless algorithm number for generated key
 - Kdig prints unknown RCODE in a numeric format
 - Better support for LLVM libFuzzer

Bugfixes:
---------
 - Faulty DNAME semantic check if present in the zone apex and NSEC3 is used
 - Immediate zone flush not scheduled during the zone load event
 - Server crashes upon dynamic zone addition if a query module is loaded
 - Kdig fails to connect over TLS due to SNI is set to server IP address
 - Possible out-of-bounds memory access at the end of the input
 - TCP Fast Open enabled by default in kdig breaks TLS connection

Knot DNS 2.6.0 (2017-09-29)
===========================

Features:
---------
 - On-slave (inline) signing support
 - Automatic DNSSEC key algorithm rollover
 - Ed25519 algorithm support in DNSSEC (requires GnuTLS 3.6.0)
 - New 'journal-content' and 'zonefile-load' configuration options
 - keymgr tries to run as user/group set in the configuration
 - Public-only DNSSEC key import into KASP DB via keymgr
 - NSEC3 resalt and parent DS query events are persistent in timer DB
 - New processing state for a response suppression within a query module
 - Enabled server side TCP Fast Open if supported
 - TCP Fast Open support in kdig

Improvements:
-------------
 - Better record owner compression if related to the previous rdata dname
 - NSEC(3) chain is no longer recomputed whole on every update
 - Remove inconsistent and unnecessary quoting in log files
 - Avoiding of overlapping key rollovers at a time
 - More DNSSSEC-related semantic checks
 - Extended timestamp format in keymgr

Bugfixes:
---------
 - Incorrect journal free space computation causing inefficient space handling
 - Interface-automatic broken on Linux in the presence of asymmetric routing

Knot DNS 2.5.7 (2018-01-02)
===========================

Bugfixes:
---------
 - Unintentional zone re-sign during reload if empty NSEC3 salt
 - Inconsistent zone names in journald structured logs
 - Malformed outgoing transfer for big zone with TSIG
 - Unexpected reply for DS query with an owner below a delegation point
 - Old dependencies in the pkg-config file

Knot DNS 2.5.6 (2017-11-02)
===========================

Improvements:
-------------
 - Keymgr no longer prints useless algorithm number for generated key

Bugfixes:
---------
 - Faulty DNAME semantic check if present in the zone apex and NSEC3 is used
 - Immediate zone flush not scheduled during the zone load event
 - Server crashes upon dynamic zone addition if a query module is loaded
 - Kdig fails to connect over TLS due to SNI is set to server IP address

Knot DNS 2.5.5 (2017-09-29)
===========================

Improvements:
-------------
 - Constant time memory comparison in the TSIG processing
 - Proper use of the ctype functions
 - Generated RRSIG records have inception time 90 minutes in the past

Bugfixes:
---------
 - Incorrect online signature for NSEC in the case of a CNAME record
 - Incorrect timestamps in dnstap records
 - EDNS Subnet Client validation rejects valid payloads
 - Module configuration semantic checks are not executed
 - Kzonecheck segfaults with unusual inputs

Knot DNS 2.5.4 (2017-08-31)
===========================

Improvements:
-------------
 - New minimum and maximum refresh interval config options (Thanks to Manabu Sonoda)
 - New warning when unforced flush with disabled zone file synchronization
 - New 'dnskey' keymgr command
 - Linking with libatomic on architectures that require it (Thanks to Pierre-Olivier Mercier)
 - Removed 'OK' from listing keymgr command outputs
 - Extended journal and keymgr documentation and logging

Bugfixes:
---------
 - Incorrect handling of specific corner-cases with zone-in-journal
 - The 'share' keymgr command doesn't work
 - Server crashes if configured with query-size and reply-size statistics options
 - Malformed big integer configuration values on some 32-bit platforms
 - Keymgr uses local time when parsing date inputs
 - Memory leak in kdig upon IXFR query

Knot DNS 2.5.3 (2017-07-14)
===========================

Features:
---------
 - CSK rollover support for Single-Type Signing Scheme

Improvements:
-------------
 - Allowed binding to non-local adresses for TCP (Thanks to Julian Brost!)
 - New documentation section for manual DNSSEC key algorithm rollover
 - Initial KSK also generated in the submission state
 - The 'ds' keymgr command with no parameter uses all KSK keys
 - New debug mode in kjournalprint
 - Updated keymgr documentation

Bugfixes:
---------
 - Sometimes missing RRSIG by KSK in submission state.
 - Minor DNSSEC-related issues

Knot DNS 2.5.2 (2017-06-23)
===========================

Security:
---------
 - CVE-2017-11104: Improper TSIG validity period check can allow TSIG forgery (Thanks to Synacktiv!)

Improvements:
-------------
 - Extended debug logging for TSIG errors
 - Better error message for unknown module section in the configuration
 - Module documentation compilation no longer depends on module configuration
 - Extended policy section configuration semantic checks
 - Improved python version compatibility in pykeymgr
 - Extended migration section in the documentation
 - Improved DNSSEC event timing on 32-bit systems
 - New KSK rollover start log info message
 - NULL qtype support in kdig

Bugfixes:
---------
 - Failed to process included configuration
 - dnskey_ttl policy option in the configuration has no effect on DNSKEY TTL
 - Corner case journal fixes (huge changesets, OpenWRT operation)
 - Confusing event timestamps in knotc zone-status output
 - NSEC/NSEC3 bitmap not updated for CDS/CDNSKEY
 - CDS/CDNSKEY RRSIG not updated

Knot DNS 2.5.1 (2017-06-07)
===========================

Bugfixes:
---------
 - pykeymgr no longer crash on empty json files in the KASP DB directory
 - pykeymgr no longer imports keys in the "removed" state
 - Imported keys in the "removed" state no longer makes knotd to crash
 - Including an empty configuration directory no longer makes knotd to crash
 - pykeymgr is distributed and installed to the distribution tarball

Knot DNS 2.5.0 (2017-06-05)
===========================

Features:
---------
 - KASP database switched from JSON files to LMDB database
 - KSK rollover support using CDNSKEY and CDS in the automatic DNSSEC signing
 - Dynamic module loading support with proper module API
 - Journal can store full zone contents (not only differences)
 - Zone freeze/thaw support
 - Updated knotc zone-status output with optional column filters
 - New '[no]crypto' option in kdig
 - New keymgr implementation reflecting KASP database changes
 - New pykeymgr for JSON-based KASP database migration
 - Removed obsolete knot1to2 utility

Improvements:
-------------
 - Added libidn2 support to kdig (with libidn fallback)
 - Maximum timer database switched from configure to the server configuration

Knot DNS 2.4.4 (2017-06-05)
===========================

Improvements:
-------------
 - Improved error handling in kjournalprint

Bugfixes:
---------
 - Zone flush not replanned upon unsuccessful flush
 - Journal inconsistency after deleting deleted zone
 - Zone events not rescheduled upon server reload (Thanks to Mark Warren)
 - Unreliable LMDB mapsize detection in kjournalprint
 - Some minor issues found by AddressSanitizer

Knot DNS 2.4.3 (2017-04-11)
===========================

Improvements:
-------------
 - New 'journal-db-mode' optimization configuration option
 - The default TSIG algorithm for utilities input is HMAC-SHA256
 - Implemented sensible default EDNS(0) padding policy (Thanks to D. K. Gillmor)
 - Added some more semantic checks on the knotc configuration operations

Bugfixes:
---------
 - Missing 'zone' keyword in the YAML output
 - Missing trailing dot in the keymgr DS owner output
 - Journal logs 'invalid parameter' in several cases
 - Some minor journal-related problems

Knot DNS 2.4.2 (2017-03-23)
===========================

Features:
---------
 - Zscanner can store record comments placed on the same line
 - Knotc status extension with version, configure, and workers parameters

Improvements:
-------------
 - Significant incoming XFR speed-up in the case of many zones

Bugfixes:
---------
 - Double OPT RR insertion when a global module returns KNOT_STATE_FAIL
 - User-driven zscanner parsing logic inconsistency
 - Lower serial at master doesn't trigger any errors
 - Queries with too long DNAME substitution do not return YXDOMAIN response
 - Incorrect elapsed time in the DDNS log
 - Failed to process forwarded DDNS request with TSIG

Knot DNS 2.4.1 (2017-02-10)
===========================

Improvements:
-------------
 - Speed-up of rdata addition into a huge rrset
 - Introduce check of minimum timeout for next refresh
 - Dnsproxy module can forward all queries without local resolving

Bugfixes:
--------
 - Transfer of a huge rrset goes into an infinite loop
 - Huge response over TCP contains useless TC bit instead of SERVFAIL
 - Failed to build utilities with disabled daemon
 - Memory leaks during keys removal
 - Rough TSIG packet reservation causes early truncation
 - Minor out-of-bounds string termination write in rrset dump
 - Server crash during stop if failed to open timers DB
 - Failed to compile on OS X older than Sierra
 - Poor minimum UDP-max-size configuration check
 - Failed to receive one-record-per-message IXFR-style AXFR
 - Kdig timeouts when receiving RCODE != NOERROR on subsequent transfer message

Knot DNS 2.4.0 (2017-01-18)
===========================

Bugfixes:
--------
 - False positive semantic-check warning about invalid bitmap in NSEC
 - Unnecessary SOA queries upon notify with up to date serial
 - Timers for expired zones are reset on reload
 - Zone doesn't expire when the server is down
 - Failed to handle keys with duplicate keytags
 - Per zone module and global module insconsistency
 - Obsolete online signing module configuration
 - Malformed output from kjournalprint
 - Redundant SO_REUSEPORT activation on the TCP socket
 - Failed to use higher number of background workers

Improvements:
-------------
 - Lower memory consumption with qp-trie
 - Zone events and zone timers improvements
 - Print all zone names in the FQDN format
 - Simplified query module interface
 - Shared TCP connection between SOA query and transfer
 - Response Rate Limiting as a module with statistics support
 - Key filters in keymgr

Features:
---------
 - New unified LMDB-based zone journal
 - Server statistics support
 - New statistics module for traffic measuring
 - Automatic deletion of retired DNSSEC keys
 - New control logging category

Knot DNS 2.3.4 (2017-11-20)
===========================

Security:
---------
 - CVE-2017-11104: Improper TSIG validity period check can allow TSIG forgery (Thanks to Synacktiv!)

Bugfixes:
---------
 - Unexpected response for DS query below delegation poing
 - Zone events not rescheduled upon server reload (Thanks to Mark Warren)
 - Missing trailing dot in the keymgr DS owner output
 - Malformed output from kjournalprint
 - Redundant SO_REUSEPORT activation on the TCP socket

Knot DNS 2.3.3 (2016-12-08)
===========================

Bugfixes:
---------
 - Double free when failed to apply zone journal
 - Zone bootstrap retry interval not preserved upon zone reload
 - DNSSEC related records not flushed if not signed
 - False semantic checks warning about incorrect type in NSEC bitmap
 - Memory leak in kzonecheck

Improvements:
-------------
 - All zone names are fully-qualified in log

Features:
---------
 - New kjournalprint utility

Knot DNS 2.3.2 (2016-11-04)
===========================

Bugfixes:
---------
 - Incorrect %s expansion for the root zone
 - Failed to refresh not existing slave zone after restart
 - Immediate zone refresh upon restart if refresh already scheduled
 - Early zone transfer after restart if transfer already scheduled
 - Not ignoring empty non-terminal parents during delegation lookup
 - CD bit preservation in responses
 - Compilation error on GNU/kFreeBSD
 - Server crash after double zone-commit if journal error

Improvements:
-------------
 - Speed-up of knotc if control operation and known socket
 - Zone purge operation purges also zone timers

Features:
---------
 - Simple modules don't require empty configuration section
 - New zone journal path configuration option
 - New timeout configuration option for module dnsproxy

Knot DNS 2.3.1 (2016-10-07)
===========================

Bugfixes:
---------
 - Missing glue records in some responses
 - Knsupdate prompt printing on non-terminal
 - Mismatch between configuration policy item names and documentation
 - Segfault on OS X (Sierra)

Improvements:
-------------
 - Significant speed-up of conf-commit and conf-diff operations (in most cases)
 - New EDNS Client Subnet libknot API
 - Better semantic-checks error messages

Features:
---------
 - Print TLS certificate hierarchy in kdig verbose mode
 - New +subnet alias for +client
 - New mod-whoami and mod-noudp modules
 - New zone-purge control command
 - New log-queries and log-responses options for mod-dnstap

Knot DNS 2.3.0 (2016-08-09)
===========================

Bugfixes:
---------
 - No wildcard expansion below empty non-terminal for NSEC signed zone
 - Avoid multiple loads of the same PKCS #11 module
 - Fix kdig IXFR response processing if the transfer content is empty
 - Don't ignore non-existing records to be removed in IXFR

Improvements:
-------------
 - Refactored semantic checks and improved error messages
 - Set TC flag in delegation only if mandatory glue doesn't fit the response
 - Separate EDNS(0) payload size configuration for IPv4 and IPv6

Features:
---------
 - DNSSEC policy can be defined in server configuration
 - Automatic NSEC3 resalt according to DNSSEC policy
 - Zone content editing using control interface
 - Zone size limit restriction for DDNS, AXFR, and IXFR (CVE-2016-6171)
 - DNS-over-TLS support in kdig (RFC 7858)
 - EDNS(0) padding and alignment support in kdig (RFC 7830)

Knot DNS 2.2.1 (2016-05-24)
===========================

Bugfixes:
---------
 - Fix separate logging of server and zone events
 - Fix concurrent zone file flushing with many zones
 - Fix possible server crash with empty hostname on OpenWRT
 - Fix control timeout parsing in knotc
 - Fix "Environment maxreaders limit reached" error in knotc
 - Don't apply journal changes on modified zone file
 - Remove broken LTO option from configure script
 - Enable multiple zone names completion in interactive knotc
 - Set the TC flag in a response if a glue doesn't fit the response
 - Disallow server reload when there is an active configuration transaction

Improvements:
-------------
 - Distinguish unavailable zones from zones with zero serial in log messages
 - Log warning and error messages to standard error output in all utilities
 - Document tested PKCS #11 devices
 - Extended Python configuration interface

Knot DNS 2.2.0 (2016-04-26)
===========================

Bugfixes:
---------
 - Fix build dependencies on FreeBSD
 - Fix query/response message type setting in dnstap module
 - Fix remote address retrieval from dnstap capture in kdig
 - Fix global modules execution for queries hitting existing zones
 - Fix execution of semantic checks after an IXFR transfer
 - Fix PKCS#11 support detection at build time
 - Fix kdig failure when the first AXFR message contains just the SOA record
 - Exclude non-authoritative types from NSEC/NSEC3 bitmap at a delegation
 - Mark PKCS#11 generated keys as sensitive (required by Luna SA)
 - Fix error when removing the only zone from the server
 - Don't abort knotc transaction when some check fails

Features:
---------
 - URI and CAA resource record types support
 - RRL client address based white list
 - knotc interactive mode

Improvements:
-------------
 - Consistent IXFR error messages
 - Various fixes for better compatibility with PKCS#11 devices
 - Various keymgr user interface improvements
 - Better zone event scheduler performance with many zones
 - New server control interface
 - kdig uses local resolver if resolv.conf is empty

Knot DNS 2.1.1 (2016-02-10)
===========================

Bugfixes:
---------
 - DNSSEC: Allow import of duplicate private key into the KASP
 - DNSSEC: Avoid duplicate NSEC for Wildcard No Data answer
 - Fix server crash when an incoming transfer is in progress and reload is issued
 - Fix socket polling when configured with many interfaces and threads
 - Fix compilation against Nettle 3.2

Improvements:
-------------
 - Select correct source address for UDP messages received on ANY address
 - Extend documentation of knotc commands

Knot DNS 2.1.0 (2016-01-14)
===========================

Features:
---------
 - Per-thread UDP socket binding using SO_REUSEPORT on Linux
 - Support for dynamic configuration database
 - DNSSEC: Support for cryptographic tokens via PKCS #11 interface
 - DNSSEC: Experimental support for online signing

Improvements:
-------------
 - Support for zone file name patterns
 - Configurable location of zone timer database
 - Non-blocking network operations and better timeout handling
 - Caching of Critical configuration values for better performance
 - Logging of ACL failures
 - RRL: Add rate-limit-slip zero support to drop all responses
 - RRL: Document behavior for different rate-limit-slip options
 - kdig: Warning instead of error on TSIG validation failure
 - Cleanup of support libraries interfaces (libknot, libzscanner, libdnssec)
 - Remove possibly insecure server control over a network socket
 - Remove implementation limit for the number of network interfaces

Bugfixes:
---------
 - synth-record module: Fix application of default configuration options
 - TSIG: Allow compressed TSIG name when forwarding DDNS updates
 - Schedule zone bootstrap after slave zone fails to load from disk

Knot DNS 2.0.2 (2015-11-24)
===========================

Bugfixes:
---------
 - Out-of-bound read in packet parser for malformed NAPTR records (LibFuzzer)

Knot DNS 2.0.1 (2015-09-02)
===========================

Bugfixes:
---------
 - Do not reload expired zones on 'knotc reload' and server startup
 - Fix rare race-condition in event scheduling causing delayed event execution
 - Fix skipping of non-authoritative nodes in NSEC proofs
 - Fix TC flag setting in RRL slipped answers
 - Disable domain name compression for root label
 - Log via journald only when running under systemd
 - Fix CNAME following when quering for NSEC RR type
 - Fix refreshing of DNSSEC signatures for zone keys
 - Fix binding an unavailable IPv6 address on Linux (IP_FREEBIND)
 - Fix infinite loop in knotc zonestatus and memstats
 - Fix memory leak in configuration on server shutdown
 - Fix broken dnsproxy module
 - Fix DNSSEC KASP timestamps parsing in strict POSIX environment
 - Fix multi value parsing on big-endian
 - Adapt to Nettle 3 API break causing base64 decoding failures on big-endian

Features:
---------
 - Add 'keymgr zone key ds' to show key's DS record
 - Add 'keymgr tsig generate' to generate TSIG keys
 - Add query module scoping to process either all queries or zone queries only
 - Add support for file name globbing in config file includes
 - Add 'request-edns-option' config option to add custom EDNS0 option into
   server initiated queries

Improvements:
-------------
 - Send minimal responses (remove NS from Authority section for NOERROR)
 - Update persistent timers only on shutdown for better performance
 - Allow change of RR TTL over DDNS
 - Documentation fixes, updates, and improvements in formatting
 - Install yparser and zscanner header files
 - Improve lookup of libsystemd build dependencies
 - Fix compilation warnings in endian conversion functions on OpenBSD

Knot DNS 2.0.0 (2015-06-26)
===========================

Bugfixes:
---------
 - Fix lost NOTIFY message if received during zone transfer
 - Disable fast zone parser when compiled in Clang (workaround for Clang bug)
 - kdig: Record correct dnstap SocketProtocol when retrying over TCP
 - kdig: Hide TSIG section with +noall
 - Do not set AA flag for AXFR/IXFR queries

Features:
---------
 - DNSSEC: separate library, switch to GnuTLS, new utilities
 - DNSSEC: basic KASP support (generate initial keys, ZSK rollover)
 - Configuration: New text format in YAML, binary store in LMDB
 - Zone parser: Split long TXT/SPF strings into multiple strings
 - kdig: Add generic dump style option (+generic)
 - Try all master servers in multi-master environment
 - Improved remotes and ACLs (multiple addresses, multiple keys)
 - Basic support for zone file patterns (%s to substitute zone name)
 - Disable zone file synchronization by setting 'zonefile_sync' to '-1'
 - knsupdate: Add input prompt in interactive mode and 'quit' command
 - knsupdate: Allow TSIG algorithm specification in interactive prompt

Improvements:
-------------
 - Zone dump: Do not write class for SOA record (unified with other RR types)
 - Zone dump: Do not write master server address into the zone file
 - Documentation: Manual pages are included in HTML and PDF

Knot DNS 1.6.3 (2015-04-08)
===========================

Bugfixes:
---------
 - Performance drop for NSEC-signed zones
 - Proper handling of TCP short-writes
 - Out-of-bound read in zone parser for long domain names in origin (AFL fuzzer)
 - Out-of-bound read in packet parser for TSIG RR without RDATA (AFL fuzzer)
 - Out-of-bound read in packet parser for malformed NAPTR RR (AFL fuzzer)

Features:
--------
 - CDS and CDNSKEY support in zone parser

Improvements:
-------------
 - Add defaults for TCP config options into documentation
 - Detailed error message if zone reload fails

Knot DNS 1.6.2 (2015-02-19)
===========================

Features:
---------
 - Limiting number of parallel TCP clients (max-tcp-clients config option)

Bugfixes:
---------
 - Ignore refresh and transfer events on non-slave zones
 - Compilation with Dnstap support on FreeBSD
 - Possible file descriptor leak when terminating inactive TCP clients

Knot DNS 1.6.1 (2014-12-13)
===========================

Bugfixes:
---------
 - Journal file would sometimes outgrow its limit (ixfr-fslimit in configuration)
 - Fixed incompatibility with OpenSSL 0.9.8
 - Proper handling when hostname cannot be retreived (for NSID and CH)

Features:
---------
 - DNSSEC Single Type Signing Scheme is now supported

Knot DNS 1.6.0 (2014-10-23)
===========================

Bugfixes:
---------
 - Fix zone expiration when AXFR/IXFR is being refused by master
 - Fix forced zone refresh on slave (knotc refresh -f)

Knot DNS 1.6.0-rc2 (2014-10-17)
===============================

Improvements:
-------------
 - Maximal size of persistent timers database increased from 10 MB to 100 MB
 - Added logging of persistent timers database errors

Bugfixes:
---------
 - Persistent timers database opening after privileges has been dropped

Knot DNS 1.6.0-rc1 (2014-10-13)
===============================

Features:
---------
 - Persistent timers for slave zones (expire, refresh, and flush)

Bugfixes:
---------
 - DNSSEC: RFC compliant processing of letter case in RDATA domain names
 - EDNS: Return minimal error response for queries with unsupported version
 - EDNS: Fix interpretation of Extended RCODE

Knot DNS 1.5.3 (2014-09-15)
===========================

Bugfixes:
---------
 - Some specific incoming IXFRs were causing server to crash
 - Rare sychronization error during reload caused read-after-free
 - Response synthetization module did not work properly with DNSSEC-enabled zones
 - When Knot sent AXFR when IXFR was requested, message ID and opcode were wrong
 - Knot failed to send large messages to remote control (present since 1.5.1)

Knot DNS 1.5.2 (2014-09-08)
===========================

Bugfixes:
---------
 - Some RR parsing corner cases were not handled properly
 - AXFR-style IXFR was refused and had to be retransferred
 - Hash character (#) was not properly escaped when storing text zone file

Knot DNS 1.5.1 (2014-08-19)
===========================

Features:
---------
 - Basic support for logging using systemd journal
 - DDNS: Ability to process updates in bulk

Improvements:
-------------
 - Unified logging messages structure
 - DNSSEC: More strict controls for signing keys

Bugfixes:
---------
 - DNSSEC: DNAMEs in RDATA were not lowercased before signing
 - EDNS: OPT RR were not put into responsing for some errors
 - TSIG: DDNS responses were not signed with TSIG
 - DDNS: Prerequisite checks failed for some inputs
 - knsupdate: Zone origin was not used for deletions

Knot DNS 1.5.0 (2014-07-08)
===========================

Features:
---------
 - DDNS forwarding reimplemented

Improvements:
-------------
 - Transfer sizes logged in bytes if needed
 - Logging outgoing NOTIFY messages
 - Logging unauthorized incoming NOTIFYs

Bugfixes:
---------
 - Zone flush planning after bootstrap
 - Incorrect incoming AXFR message sizes
 - DDNS signing changes were freed too soon, posibility of stale data
 - knotc remote control key handling

Knot DNS 1.5.0-rc2 (2014-06-18)
===============================

Features:
---------
 - edns-client-subnet support in kdig
 - Optional asynchronous startup (config "asynchronous-start")

Improvements:
-------------
 - Preempt task queue for faster reload
 - Lazy zone file write after zone transfer (governed by
   "zonefile-sync")

Bugfixes:
---------
 - Close zone transfer after SERVFAIL response
 - Incremental to full zone transfer fallback, wrong log message
 - Zone events corner cases, reload replanning

Knot DNS 1.5.0-rc1 (2014-06-03)
===============================

Features:
---------
 - Pluggable query processing modules
 - Synthetic IPv4/IPv6 reverse/forward records (optional module)
 - dnstap support in both utilities & server (optional module)
 - NOTIFY message support and new TSIG section in kdig
 - Zone transfer master failover

Improvements:
-------------
 - Query processing and core functionality overhaul
 - Performance and reduced memory footprint
 - Faster zone events scheduling
 - RFC compliant queries/responses in some corner cases
 - Log messages
 - New documentation (Sphinx)

Knot DNS 1.4.2 (2014-01-27)
===========================

Bugfixes:
---------
 - AXFR/IXFR compatibility issues with tinydns/axfrdns
 - Journal file is created only when needed
 - Zone-related log messages are logged into correct category
 - DNSSEC: Refresh signatures earlier (3 days before their expiration
    with the default signature lifetime)
 - Fixed RCU synchronization causing deadlock on 'knotc signzone'
 - RRSIG not fitting in the additional records doesn't cause
   truncation

Knot DNS 1.4.1 (2014-01-13)
===========================

Bugfixes:
---------
 - Empty APL record support
 - 'zonestatus' when using immediate zone syncing
 - Immediate zone syncing after reload
 - Race condition writing time values to zone file

Knot DNS 1.4.0 (2014-01-06)
===========================

Features:
---------
 - Zone SERIAL policies (INCREMENT, UNIXTIME)
 - IDN support in Knot utilities
 - DNSSEC: support for GOST algorithm
 - Better logging of automatic DNSSEC events
 - Support for DNSSEC key pre-publication
 - Experimental automatic DNSSEC signing
 - Reduced memory usage

Improvements:
-------------
 - ./configure prints build configuration summary
 - Pretty zone file output (DNSSEC-related data separately)
 - Lower memory consumption
 - config: option 'dnssec-keydir' can be set per zone
 - config: option 'storage' can be set per zone

Bugfixes:
---------
 - AXFR crash with specific packet
 - QNAME case-sensitive since 1.4.0-rc0
 - DNSSEC records over DDNS
 - Semantic check fail in AXFR is only soft-error
 - Journal race condition
 - Notifies are sent immediately
 - Crash in particular additionals processing
 - Race condition in event cancellation
 - Journal corruption after failed transactions
 - DNSSEC: fixed detection of ECDSA support
 - Refactored zone loading
 - Improved journal locking and fixed some race conditions
 - Various fixes in client utilities
 - Fixed memory errors in automatic DNSSEC signing
 - 'dnssec-keydir' doesn't auto-enable signing
 - Fixed rescheduling of zone resigns

Knot DNS 1.3.3 (2013-10-28)
===========================

Bugfixes:
---------
 - Improved zone loading error messages
 - Correct control socket permissions
 - Improved log syntax documentation
 - Fixed wrong assertions in DDNS prerequisites checking
 - Fixed processing of some malformed DNS packets
 - Fixed notify messages being ignored in some cases

Knot DNS 1.3.2 (2013-09-30)
===========================

Bugfixes:
---------
 - Configuration option for EDNS0 max UDP payload.
 - Max UDP payload from EDNS0 affected TCP responses.
 - Fixed build on SLE 10.
 - knotc reload did not close files included from config.

Knot DNS 1.3.1 (2013-08-26)
===========================

Bugfixes:
---------
 - Response with NSID contained extra bytes after reload
 - List of remotes is scanned for longest prefix match
 - Multipacket TSIG signatures for transfers
 - Wrongly parsed TSIG key secret without quotes
 - Removed autoconf checks for extended instruction sets

Knot DNS 1.3.0 (2013-08-05)
===========================

Features:
---------
 - Defaults for CH TXT id.server,version.server (see doc)
 - Much faster bootstrap of many zones
 - --with-configdir option for default config path
 - Reintroducted 'pidfile' config option
 - Utility to estimate memory consumption (see 'knotc memstats')
 - PID file is not created when running on foreground
 - UNIX sockets support for knotc
 - Configurable 'rundir' and 'storage'
 - Faster zone parser
 - Full support for EUI and ILNP resource records
 - Lower memory footprint for large zones
 - No compilation of zones
 - Improved scheduling of zone transfers
 - Logging of serials and timing information for zone transfers
 - Config: 'groups' keyword allowing to create groups of remotes
 - Config: 'include' keyword allowing other file includes
 - Client utilities: kdig, khost, knsupdate
 - Server identification using TXT/CH queries (RFC 4892)
 - Improved build scripts
 - Improved dname compression and performance

Bugfixes:
---------
 - Progressive interval for bootstrap retry
 - Transfers randomly cancelled
 - Disabling RRL on reload
 - Secondary groups not initialized when dropping privileges
 - Responding to DS queries for names at or below delegation points
 - Removed deprecated 'knotc -w' option
 - Slave ignores out-of-zone records in zone
 - Support for obsolete types in zone transfers
 - Slave zone file names fixes
 - Long transfers being randomly dropped
 - AXFR/IXFR subsystem performance improvements
 - Rescheduling of AXFR in some cases
 - RRSIGs not in the same section for DS records
 - Log messages leaking to syslog
 - 'knotc restart' option removed due to several limitations
 - IXFR with an arbitrary number of diffs
 - Processing of knotc TSIG keyfile
 - Atomic PID file writing, removed deprecated 'knotc start'
 - Performance regression when RRSIGs came before covered RRs in AXFR
 - Label compression related bug
 - Proper resolution of some CNAME chains
 - Unstable response rate in rare cases
 - Several log messages
 - Fixed creating of PID file when dropping privileges

Knot DNS 1.2.0 (2013-03-29)
===========================

Features:
---------
 - knotc 'zonestatus' command
 - Response rate limiting (see documentation)
 - Dynamic updates, including forwarding (limited on signed zones)
 - Updated remote control utility
 - Configurable TCP timeouts
 - LOC RR support

Bugfixes:
---------
 - Memory leaks
 - Check for broken recvmmsg() implementation
 - Changing logfile ownership before dropping privileges
 - knotc respects 'control' section from configuration
 - RRL: resolved bucket collisions
 - RRL: updated bucket mapping to conform RRL technical memo
 - Fixed OpenBSD build
 - Responses to ANY should contain RRSIGs
 - Fixed processing of some non-standard dnames.
 - Correct checking of label length bounds in some cases.
 - More compliant rcodes in case of DDNS/TSIG failures.
 - Correct processing of malformed DDNS prereq section.

Knot DNS 1.1.3 (2012-12-19)
===========================

Bugfixes:
---------
 - Updated manpage.
 - Fixed answering DS queries (RRSIGs not together with DS, AA bit
    missing).
 - Fixed setting ARCOUNT in some error responses with EDNS enabled.
 - Fixed crash when compiling zone zone with NSEC3PARAM but no NSEC3
    and semantic checks enabled.

Knot DNS 1.1.2 (2012-11-21)
===========================

Bugfixes:
---------
 - Fixed debug message.
 - Fixed crash on reload when config contained duplicate zones.
 - Fixed scheduling of transfers.

Knot DNS 1.1.1 (2012-10-31)
===========================

Features:
---------
 - Improved compression of packets. Out-of-zone dnames present in
    RDATA were not compressed.
 - Slave zones are now automatically refreshed after startup.
 - Proper response to IXFR/UDP query (returns SOA in Authority
   section).

Bugfixes:
---------
 - Fixed assertion failing when asking directly for a wildcard name.
 - Crash after IXFR in certain cases when adding RRSIG in an IXFR.
 - Fixed behaviour when incoming IXFR removes a zone cut. Previously
    occluded names now become properly visible. Previously lead to a
    crash when the server was asked for the previously occluded name.
 - Fixed handling of zero-length strings in text zone dump. Caused the
    compilation to fail.
 - Fixed TSIG algorithm name comparison - the names should be in
    canonical form.
 - Fixed handling unknown RR types with type less than 251.

Knot DNS 1.1.0 (2012-08-31)
===========================

Features:
---------
 - Signing SOA with TSIG queries when checking zone version with
   master.
 - Optionally disable ANY queries for authoritative answers.
 - Dropping identical records in zone and incoming transfers.
 - Support for '/' in zone names.
 - Generating journal from reloaded zone (EXPERIMENTAL).
 - Outgoing-only interfaces in configuration file.
 - Following DNAME if the synthetized name is in the same zone.

Bugfixes:
---------
 - Syncing journal to zone was not updating the compiled zone
   database.
 - Fixed ixfr-from-differences journal generation in case of IPSECKEY
    and APL records.
 - Fixed possible leak on server shutdown with a pending transfer.
 - Crash when zone contained RRSIG signing a CNAME, but did not
    contain the CNAME.
 - Malformed packets parsing.
 - Failed IXFR caused memory leaks.
 - Failed IXFR might have resulted in inconsistent zone structures.
 - Fixed answering to +dnssec queries when NSEC3 chain is corrupted.
 - Fixed answering when transitioning from NSEC3 to NSEC.
 - Fixed answering when zone contains multiple NSEC3 chains.
 - Handling RRSets with different TTLs - TTL from the first RR is
   used.
 - Synchronization of zone reload and zone transfers.
 - Fixed build on NetBSD 5 and FreeBSD.
 - Fixed binding to both IPv4 and IPv6 at the same time on special
    interfaces.
 - Fixed access rights of created files.
 - Semantic checks corrupted RDATA domain names which are covered by
    wildcard in the same zone.

Improvements:
-------------
 - Improved user manual.
 - Better checks of corrupted zone database.
 - IXFR-in optimized.
 - Many zones loading optimized.
 - More detailed log messages (mostly transfer-related).
 - Copying Question section to error responses.
 - Using zone name from config file as default origin in zone file.
 - Additional records are now added to response also from
    wildcard-covered names.

Knot DNS 1.0.6 (2012-06-13)
===========================

Bugfixes:
---------
 - Fixed potential problems with RCU synchronization.
 - Adding NSEC/NSEC3 for all wildcard CNAMEs in the response.

Knot DNS 1.0.5 (2012-05-17)
===========================

Bugfixes:
---------
 - Fixed bug with creating journal files.

Knot DNS 1.0.4 (2012-05-16)
===========================

Features:
---------
 - Parallel loading of zones to the server.
 - RFC3339-complaint format of log time.
 - Support for TLSA (RR type 52).
 - knotc checkzone (as a dry-run of zone compile).
 - knotc refresh for forcing Knot to update all zones from master
    servers.
 - Reopening log files upon start (used to truncate them).

Improvements:
-------------
 - Significantly sped up IXFR-in and reduced its memory requirements.

Bugfixes:
---------
 - Copying OPCODE and RD bit from query to NOTIMPL responses.
 - Corrected response to CNAME queries if the canonical name was also
    an alias (was adding the whole CNAME chain to the response).
 - Fixed crash when NS or MX points to an alias.
 - Fixed problem with early closing of filedescriptors (lead to crash
    when compiling and loading or bootstrapping and restarting the
    server with a lot of zones).

Knot DNS 1.0.3 (2012-04-17)
===========================

Bugfixes:
---------
 - Corrected handling of EDNS0 when TCP is used (was applying the UDP
   size limit).
 - Fixed slow compilation of zones.
 - Fixed potential crash with many concurrent transfers.
 - Fixed missing include for FreeBSD.

Knot DNS 1.0.2 (2012-04-13)
===========================

Features:
---------
 - Configuration checker (invoked via knotc).
 - Specifying source interface for transfers and NOTIFY requests
   directly.

Bugfixes:
---------
 - Fixed leak when querying non-existing name and zone SOA TTL >
   minimal.
 - Fixed some minor bugs in tansfers.

Improvements:
-------------
 - Improved log messages (added date and time, better specification of
   XFR remote).
 - Improved saving incoming IXFR to journal (memory optimized).
 - Now using system scheduler (better for Linux).
 - Decreased thread stack size.

Knot DNS 1.0.1 (2012-05-09)
===========================

Features:
---------
 - Implemented jitter to REFRESH/RETRY timers.
 - Implemented magic bytes for journal.
 - Improved error messages.

Bugfixes:
---------
 - Problem with creating IXFR journal for bootstrapped zone.
 - Race condition in processing NOTIFY/SOA queries.
 - Leak when reloading zone with NSEC3.
 - Processing of APL RR.
 - TSIG improper assignment of algorithm type.

Knot DNS 1.0.0 (2012-02-29)
===========================

Features:
---------
 - Support for subnets in ACL.
 - Debug messages enabling in configure.
 - Optimized memory consuption of zone structures.
 - NSID support (RFC5001).
 - Root zone support.
 - Automatic zone compiling on server start.
 - Setting user to run Knot under in config file.
 - Dropping privileges after binding to port 53.
    + Support for Linux capabilities(7).
 - Setting source address of outgoing transfers in config file.
 - Custom PID file.
 - CNAME loop detection.
 - Timeout on TCP connections.
 - Basic defense against DoS attacks.

Bugfixes:
---------
 - Memory errors and leaks.
 - Fixed improper handling of failed IXFR/IN.
 - Several other minor bugfixes.
 - Fixed IXFR processing.
 - Patched URCU so that it compiles on architectures without TLS in
   compiler (NetBSD, OpenBSD).
 - Fixed response to DS query at parent zone.
 - A lot of other bugfixes.

Knot DNS 0.9.1 (2012-01-20)
===========================

Features:
---------
 - RRSet rotation

Improvements:
-------------
 - Replaced pseudo-random number generator by one with MIT/BSD
   license.

Bugfixes:
---------
 - Fixed build on BSD.
 - Fixes in parsing and dumping of zone RR types IPSECKEY, WKS, DLV,
    APL, NSAP

Knot DNS 0.9.0 (2012-01-13)
===========================

Features:
---------
 - TSIG support in both client and server.
 - Use of sendmmsg() on Linux 3.0+ (improves performance).

Bugfixes:
---------
 - Knot was not accepting AXFR-style IXFR with first SOA in a separate
    packet (i.e. from Power DNS).
 - Wrong SOA TTL in negative answers.
 - Wrong max packet size for outgoing transfers (was causing the
    packets to be malformed).
 - Wrong handling of WKS record in zone compiler.
 - Problems with zone bootstrapping.

Knot DNS 0.8.1 (2011-12-01)
===========================

Bugfixes:
---------
 - Handling SPF record.
 - Wrong text dump of unknown records.

Knot DNS 0.8.0 (2011-11-03)
===========================

Features:
---------
 - First Public Release
 - AXFR-in/-out
 - IXFR-in/-out
 - EDNS0
 - DNSSEC
 - NSEC3
 - IPv6
 - Runtime reconfiguration

Known issues:
-------------
 - Missing support for TSIG
 - Root zone support
 - NSID support
 - Other DNS classes than IN
 - RRSet rotation not implmented
 - Dynamic update support
 - IXFR code might be flaky sometimes
 - IXFR may be slow when too much (10 000+) RRSets are transferred at
   once