more log messages cleanup

src/common/log.c

src/knot/ctl/remote.c

src/knot/dnssec/zone-keys.c

src/knot/server/rrl.c

src/knot/server/server.c

src/knot/server/tcp-handler.c

src/knot/server/udp-handler.c

src/knot/updates/ddns.c

src/knot/zone/contents.c

src/knot/zone/semantic-check.c

src/knot/zone/zone-load.c

src/knot/zone/zone.c

src/knot/zone/zonefile.c