Merge remote branch 'origin/axfr-in' into axfr-in

Knot.files

samples/example.com.zone

samples/knot.conf.sample

src/Makefile.am

src/common/acl.c

src/common/acl.h

src/common/evqueue.c

src/common/skip-list.h

src/common/sockaddr.c

src/common/sockaddr.h

src/dnslib/error.h

src/dnslib/tolower.h

src/dnslib/zone.c

src/dnslib/zone.h

src/knot/conf/cf-parse.y

src/knot/other/error.h

src/knot/server/name-server.c

src/knot/server/name-server.h

src/knot/server/socket.c

src/knot/server/socket.h