Merge branch 'events-refactor' into 'master'

.ycm_extra_conf.py

Knot.files

README

scripts/timerdb-info.py

src/Makefile.am

src/contrib/dnstap/message.c

src/contrib/dnstap/message.h

src/contrib/print.c

src/contrib/print.h

src/contrib/time.c

src/contrib/time.h

src/knot/common/fdset.c

src/knot/common/fdset.h

src/knot/ctl/commands.c

src/knot/events/events.c

src/knot/events/events.h

src/knot/events/handlers.h

src/knot/events/handlers/dnssec.c

src/knot/events/handlers/expire.c

src/knot/events/handlers/flush.c