- Storing and applying changesets extracted to zones.c.
- zones_process_update() copy-pasted from normal_query_answer()
  and modified.
- Changed API of changeset storing to be more general.
- ns_prep_update_response() copy-pasted from ns_prep_normal_response()
  and modified.
- response_init_from_query() got new parameter for switching
  Question section copying.

refs #937 @1.5h

refs #937

refs #937 @15m

Refs #1877

Refs #1877

Refs #1877

- Moved to separate subsections.

No \code{}.

refs #1877 @5m

refs #1877 @15m

refs #1877

- Replaced by @pxref where applicable

Refs #2002

- IPSECKEY rdata were being parsed in wrong way - two items were stored in one. This caused no problems during responding.
- Changed storing of APL rdata so that it is the same as TXT, currently, it might have caused undesired behaviour with transfered rdata or with rdata loaded from binary.

Closes #2002 @3h

Updated log messages for denied outgoing transfers.

fixes #2007 @3h

refs #1877

refs #1877

refs #1877

- Introduction fixed
- Requirements fixed
- Installation fixed partially

Refs #1997

- Reorganized groups.
- Updated main page.

refs #1996 @30m

- If node was empty no action was taken, but all RRs from node in the other tree
  have to be added to ADD section of changeset in such a case.
- Renamed and moved functions for clarity.