+ Added documentation files to QtCreator project.

refs #1927 @1h

Actually it's more of a workaround. The compression cannot be
really fixed, it would need a rewrite.

- When not-in-zone dname was present in RDATA for more than one time
  and was covered by wildcard at the same time, wrong node was freed.

refs #1926 @20m

Now everywhere the server tries to respond with the whole Question
section. When it is not possible, it at least copies the ID and
flags.

refs #1935 @30m

Not only the name but also the algorithm must be checked.

refs #1933 @10m

An ugly bug that could have manifested in many other ways.

refs #1933 @30m

Conflicts:
	src/libknot/nameserver/name-server.c

Refs #1419 @3h

refs #1909

refs #1688

refs #1909

- When IXFR is rejected and AXFR is tried, wrong incoming packet
  could have crashed the server. Fixed this by cleaning the
  ns_xfr_t structure before the fallback.

refs #1912

refs #1688

Old: [AI]XFR of 'ZONE/(IN|OUT)' ...
New: (Incoming|Outgoing) [AI]XFR of 'ZONE' ...

refs #1912

refs #1912

- Fixed check in RDATA adjusting.
- Fixed searching for wildcard covering RDATA dname.
- Fixed zone_contents_find_dname().

TODO: Leaks memory from some nodes created during load, but only
      when there are some RDATA dnames covered by a wildcard in
      the zone.

refs #1419

- In both cases check also if the NSEC3 tree is not empty. That
  may cause problems.

refs #1922, #1933, #1597

refs #1922, #1923

refs #1912

refs #1912

Conflicts:
	src/common/dynamic-array.c
	src/knot/server/zones.c

refs #941

Wondering whether it would do everything as it should.

refs #941

Conflicts:
	src/libknot/nameserver/name-server.c