src/knot/events/handlers/refresh.c

src/knot/nameserver/process_query.c

src/knot/query/query.c

src/knot/query/query.h

src/libknot/rrtype/opt.h

src/utils/common/exec.c

tests-extra/tests/zone/expire/data/example.zone

tests-extra/tests/zone/expire/data/example.zone.1

tests-extra/tests/zone/expire/test.py