move libknot/updates to knot/updates

Knot.files

src/Makefile.am

src/knot/nameserver/name-server.c

src/knot/nameserver/name-server.h

src/knot/nameserver/update.c

src/knot/server/xfr-handler.c

src/knot/server/zones.c

src/knot/server/zones.h

src/knot/updates/changesets.c

src/knot/updates/changesets.h

src/knot/updates/ddns.c

src/knot/updates/ddns.h

src/knot/updates/xfr-in.c

src/knot/updates/xfr-in.h

src/knot/zone/zone-diff.h

src/libknot/dnssec/nsec-chain.h

src/libknot/dnssec/zone-events.h

src/libknot/dnssec/zone-nsec.h

src/libknot/dnssec/zone-sign.c

src/libknot/dnssec/zone-sign.h