- Added KNOT(D)_ENODIFF, which is now being returned when no zone diff could be produced.
- if new zone has lower serial than old zone, return KNOT_ERANGE
- Proper comparison of serials added.

Refs #1949

+ Fixed freeing of new RDATA in IXFR rollback.

refs #1952 @30m

refs #1922, #1923

refs #1565

- Modified log messages related to IXFR.
- Fixed recognition of "did not fit in packet" IXFR response.
  + Better log message in such case.

refs #1459 @20m

TSIG errors are now logged as any transfer error, which is mandated by RFC #2845.
Connection is terminated and changes are discarded on TSIG error.
No error response on client side.

fixes #1361 @3h

- Handling error response from server.
- Added new KNOT error code for this KNOT_EXFRREFUSED.
- Error codes fomr xfrin_transfer_needed() were not properly
  distinguished in zones_process_response().

TODO:
  - Retry after refused or otherwise terminated transfer.
  - Handle error responses in SOA response processing.
  - Handle error conditions in zones_process_response().

- Handling of fallback to AXFR in knot_ns_process_ixfrin().
- Handling of this condition in xfrin_process_ixfr_packet().
- Added new KNOT error code for this condition.
- Handling of this condition in xfr_process_event().

refs #1316 @2h

- Distinguishing completed transfer by the return value from
  xfrin_process_ixfr_packet().
- Handling case of only one SOA record in response (RFC1995bis 4
  a and b).

refs #1210 @1h

Commit refs #1135.

refs #1127 @1h

- Fixed error functions.

- Also added NSD's BSD license text to descriptor.c/.h

 KNOT -> KNOTD
 DNSLIB -> KNOT

refs #1087 @20m

refs #1087

- Divided dnames_from_node_to_table() to smaller functions
  (for RRSet and RDATA).
- Added add_rrset() function.
- Added new error code.

refs #920 @1h

- If both max size and OPT RR are given, the payload in the OPT RR
  cannot be larger than the max size - added check.
- Fixed API of response_add_opt().
- Disabled reallocation in response_add_opt() - larger size in OPT
  RR should not override the max size already set (max size is
  more important).

refs #769

- The file was not compiled at all.
- Had to rename it to dnslib-error.c, as it is impossible to have
  more source files with the same name in the project (Makefile
  issues).

refs #705

refs #646

refs #644, #646

refs #644, #646

refs #644, #646

refs #644, #646