Merge branch 'journal_patches' into 'master'

src/knot/nameserver/ixfr.c

src/knot/server/journal.c

src/knot/server/journal.h

src/knot/zone/zone-load.c

src/knot/zone/zone.c

src/knot/zone/zone.h

src/knot/zone/zonedb.c

tests-extra/tests/ixfr/stress/test.py

tests-extra/tools/dnstest/server.py

tests/journal.c