Merge branch 'new-rrset' of git+ssh://git.nic.cz/knot into new-rrset

src/knot/zone/semantic-check.c

src/knot/zone/semantic-check.h

src/knot/zone/zone-load.c

src/libknot/nameserver/name-server.c

src/libknot/updates/ddns.c

src/libknot/updates/xfr-in.c

src/libknot/util/debug.c

src/libknot/util/descriptor.h

src/libknot/zone/node.c

src/libknot/zone/node.h

src/libknot/zone/zone-contents.c