Moved XFR and nameserver to dnslib.

Knot.files

src/Makefile.am

src/dnslib/name-server.c

src/dnslib/name-server.h

src/dnslib/xfr-in.c

src/dnslib/xfr-in.h

src/knot/server/notify.h

src/knot/server/server.c

src/knot/server/server.h

src/knot/server/tcp-handler.c

src/knot/server/udp-handler.c

src/knot/server/xfr-handler.c

src/knot/server/xfr-handler.h

src/knot/server/zones.c

src/knot/server/zones.h