Merge branch 'master' into dnssec-over-ddns

src/knot/conf/cf-lex.l

src/knot/server/zone-load.c

src/knot/server/zones.c

src/libknot/dnssec/zone-sign.c

src/libknot/nameserver/name-server.c

src/libknot/packet/packet.c

src/libknot/packet/packet.h

src/libknot/updates/xfr-in.c