loading root hints from a zonefile
Currently we only allow loading them from a lua table: http://knot-resolver.readthedocs.io/en/latest/modules.html#c.hints.root but some systems (like Debian) prefer to package the root hints in zonefile format.
We even have lua bindings require('zonefile')
, so this should be easy to implement.
After that, we might consider to kill lib/root-hints.inc
and instead load defaults from a file at start.