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Update 20141021 Configuring layer-two peer-to-peer VPN using n2n.md
[Translated] 20141021 Configuring layer-two peer-to-peer VPN using n2n.md
Merge pull request #1875 from GOLinux/master

[Translated] 20141021 Configuring layer-two peer-to-peer VPN using n2n.md