Merge branch 'axfr-out' into development

Knot.files

samples/example.com.zone

samples/example.com.zone.nsec3

samples/knot.conf.sample

src/Makefile.am

src/common/evqueue.c

src/common/evqueue.h

src/common/lists.h

src/dnslib/consts.h

src/dnslib/debug.h

src/dnslib/dname.c

src/dnslib/dname.h

src/dnslib/dnslib-error.c

src/dnslib/edns.c

src/dnslib/edns.h

src/dnslib/error.h

src/dnslib/packet.h

src/dnslib/response.c

src/dnslib/response.h

src/dnslib/tests/dnslib/response_tests.c