Merge branch 'bootstrap_journal' into 'master'

src/knot/events/handlers/load.c

src/knot/events/handlers/refresh.c

src/knot/journal/journal.c

src/knot/journal/journal.h

src/knot/journal/serialization.c

src/knot/journal/serialization.h

src/knot/updates/changesets.c

src/knot/updates/changesets.h

src/knot/updates/zone-update.c

src/knot/zone/zone-load.c

src/knot/zone/zone-load.h

src/knot/zone/zone.c

src/knot/zone/zone.h

src/knot/zone/zonedb-load.c

src/utils/kjournalprint/main.c

tests-extra/tests/axfr/zone-in-journal/test.py

tests/test_journal.c