knot-resolver: set root.key as read-only
This PR sets root.key as read-only
Fixes https://gitlab.labs.nic.cz/turris/turris-os-packages/issues/609
cc @vcunat
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This PR sets root.key as read-only
Fixes https://gitlab.labs.nic.cz/turris/turris-os-packages/issues/609
cc @vcunat