Merge branch 'conf_reduce_compat' into 'master'

src/knot/conf/base.c

src/knot/conf/conf.c

src/knot/conf/conf.h

src/knot/conf/schema.h

src/knot/conf/tools.c

src/knot/ctl/commands.c

src/knot/dnssec/kasp/kasp_db.c

src/knot/events/handlers/refresh.c

src/knot/journal/journal_basic.c

src/knot/server/server.c

src/knot/updates/zone-update.c

src/utils/keymgr/main.c

tests/knot/test_confio.c

tests/knot/test_journal.c

tests/knot/test_zone-update.c