Merge branch 'cleanup_node' into 'master'

src/knot/ctl/remote.c

src/knot/dnssec/nsec-chain.c

src/knot/dnssec/nsec-chain.h

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/dnssec/zone-sign.h

src/knot/nameserver/axfr.c

src/knot/nameserver/internet.c

src/knot/nameserver/ixfr.c

src/knot/nameserver/nsec_proofs.c

src/knot/nameserver/process_query.h

src/knot/server/notify.c

src/knot/server/zone-load.c

src/knot/server/zones.c

src/knot/updates/ddns.c

src/knot/updates/xfr-in.c

src/knot/updates/xfr-in.h

src/knot/zone/estimator.c