Prevents leaking DNS info from the host into the guest. Also useful in other cases. [(diff)][1] [1]: https://trac.torproject.org/projects/tor/wiki/doc/TorBOX/Dev/BuildDocumentation?action=diff&version=82 URL: https://trac.torproject.org/projects/tor/wiki/doc/TorBOX/Dev/BuildDocumentation?version=82