refs #1880

- The information about transport method used must have been
  propagated into the nameserver functions. For now, it is
  transformed into information whether ANY should be checked.
- Setting TC bit for not allowed ANY queries.
- Skipping some steps if TC bit is already set in the packet
  (may be employed in other places as well).

refs #1384 @1h

Conflicts:
	src/knot/zone/zone-dump.h
	src/zcompile/zcompile.c

fixes #1873 @30m

Fixes crash that appears when journal file is corrupted while
it is lazily opened.

fixes #1873 @30m

fixes #1871 @30m

Partial core overlap was implemented to prevent stalls and
better utilization of free cores by the scheduler. Not portable.

Improves real-world performance by about 5-10%

Syntax like: 'knotc checkzone example1.com example2.com'

fixes #1229

fixes #1851

For all zones in config file only.

refs #1229

- If the name is in the zone, continue processing.

- Knot tried to follow the CNAME chain even if the QTYPE was CNAME.

refs #1868 @1h

- No error returned if the incoming packet has less than 2 bytes.
- Other cases should be handled properly.

refs #1867 @30min

- When returning general error response (i.e. without the
  Question section), the OPCODE and RD bit were not copied.

TODO: handle shorter query wire formats in some cases.

refs #1867 @2h

refs #1384