- Added zones.c/h to Knot.files (again, there is some problem with
  the repo probably).
- Added some debug output.
- Removed zone database from server completely - allocation,
  initialization and destroying is done in the nameserver only.

Chaned parameter checking in dnslib_rrset_merge. Calls dnslib_dname_compare if owner's dnames are not the same.

Refs #725 @10m

Refs #725

Refs #725

REfs #725

Refs #725

Refs #725 @20m

Fixed creation and concatenation of next hashed dname in NSEC3 checks. Used b32ntop from BSD, our implementation would not work.
Closes #709 @4h

Removed zone loading at startup (now async only).

Changed references to zone_deep_free.

Conflicts:
	src/knot/server/name-server.c

It was not possible to decide whether the RDATA dnames should all
be deleted when deleting the zone.

- Added parameters to node and zone API & propagation.
- In all calls to the zone_deep_free() function it is set to 0 now.
- Zone uses the same parameter for both normal tree and the NSEC3
  tree. That is sufficient for now, but may easily be adjusted by
  another parameter.

Commit refs #711.

refs #676

Conflicts:
	src/Makefile.am

Added check to zcompile.
Refs #713 #709 @40m

- Function for loading zone moved from server to zones
  (server_load_zone() -> zone_load()).
- Implemented function for dynamic reconfiguration of zone database
  in nameserver.
- Implemented nameserver's config hook using the above function.

- Standardized error codes from nameserver.

refs #676, #583

refs #583

- remove_zone() now takes parameter to tell if it has to destroy
  the zone after removing.
- Added find_zone() which finds only exactly matching zone.

refs #676

refs #712