Update PreventingDnsLeaksInTor wiki page
[[doc/PreventingDnsLeaksInTor]] is from 2005. This pad is to draft a new version: https://pad.riseup.net/p/PreventingDnsLeaksInTor
[[doc/PreventingDnsLeaksInTor]] is from 2005. This pad is to draft a new version: https://pad.riseup.net/p/PreventingDnsLeaksInTor