refs #1087

refs #1087, #1048, #1057

Conflicts:
	Knot.files
	src/Makefile.am
	src/dnslib/zonedb.c
	src/zcompile/zcompile.c

refs #1048 @15m

refs #1047 @15m

Still todo: test zonedb
Refs #1068 @6.5h

- Moved changesets into separate dnslib module, but API is not
  renamed yet.
- A lot of stuff moved from xfr-in to zones.

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

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

Conflicts:
	Knot.files
	src/dnslib/debug.c
	src/dnslib/debug.h
	src/dnslib/dname-table.c
	src/dnslib/dname-table.h
	src/dnslib/hash/cuckoo-hash-table.c
	src/dnslib/hash/cuckoo-hash-table.h
	src/dnslib/node.c
	src/dnslib/node.h
	src/dnslib/tests/dnslib/zone_tests.c
	src/dnslib/zone-dump.c
	src/dnslib/zone-load.c
	src/dnslib/zone-tree.c
	src/dnslib/zone-tree.h
	src/dnslib/zone.c
	src/dnslib/zone.h
	src/knot/conf/cf-parse.y
	src/knot/server/journal.c
	src/knot/server/name-server.c
	src/knot/server/xfr-handler.c
	src/knot/server/xfr-handler.h
	src/knot/server/xfr-in.c
	src/knot/server/zones.c
	src/knot/server/zones.h

refs #1087 @10m

refs #1087 @5h

fixes #923

fixes #940

- server, stat, error

refs #1087 @30m

refs #1087 @20m

refs #1087

Conflicts:
	src/knot/server/xfr-in.c

- Renamed to either deep_copy or shallow_copy.
- Removed zonedb_copy() (not used).

- Not sure if this is OK at all times.

fixes #992

Conflicts:
	src/knot/conf/cf-lex.l
	src/zcompile/zcompile.c
	src/zcompile/zparser.y

- Was not increasing reference count.

refs #993

+ changed RRSet comparing function to compare also TTLs

fixes #1030 @ 45m