Merge branch 'mod-queryacl' into 'master'

Knot.files

configure.ac

doc/configuration.rst

src/knot/Makefile.inc

src/knot/include/module.h

src/knot/modules/queryacl/Makefile.inc

src/knot/modules/queryacl/queryacl.c

src/knot/modules/queryacl/queryacl.rst

src/knot/modules/rrl/rrl.c

src/knot/nameserver/query_module.c

tests-extra/tests/modules/queryacl/test.py

tests-extra/tools/dnstest/config.py

tests-extra/tools/dnstest/module.py

tests-extra/tools/dnstest/server.py