Merge branch 'changeset-refactor' into 'master'

Knot.files

src/common-knot/hattrie/hat-trie.c

src/common-knot/hattrie/hat-trie.h

src/knot/dnssec/nsec-chain.c

src/knot/dnssec/nsec3-chain.c

src/knot/dnssec/zone-events.c

src/knot/dnssec/zone-nsec.c

src/knot/dnssec/zone-sign.c

src/knot/nameserver/ixfr.c

src/knot/nameserver/ixfr.h

src/knot/nameserver/update.c

src/knot/server/journal.c

src/knot/server/journal.h

src/knot/server/serialization.c

src/knot/server/serialization.h

src/knot/updates/apply.c

src/knot/updates/apply.h

src/knot/updates/changesets.c

src/knot/updates/changesets.h

src/knot/updates/ddns.c