Unify logging messages

src/knot/conf/conf.c

src/knot/ctl/knotc_main.c

src/knot/ctl/process.c

src/knot/ctl/remote.c

src/knot/dnssec/zone-events.c

src/knot/dnssec/zone-keys.c

src/knot/main.c

src/knot/modules/synth_record.c

src/knot/nameserver/axfr.c

src/knot/nameserver/axfr.h

src/knot/nameserver/ixfr.c

src/knot/nameserver/notify.c

src/knot/nameserver/process_answer.h

src/knot/nameserver/process_query.h

src/knot/server/journal.c

src/knot/server/net.c

src/knot/server/rrl.c

src/knot/server/server.c

src/knot/server/tcp-handler.c

src/knot/updates/ddns.c