Issue 1379 - Update to nginx 1.6.2

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extra : amend_source : 2289e24132b582b9aa05c99a9ed49306b8b006cf
extra : histedit_source : 92efbbc2839f85d0cb5dca891696ef7ea32a4fcf
Issue 402 - Use a redirector script for downloads, not a direct link

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extra : rebase_source : 26e8d2b0f45490181c0c557a3aea0b7d82db61b3
extra : histedit_source : 3bff9c15facc9f999068991f7675355de883a8e0
Issue 402 - Fixed typo in a setting
Merge branch 'upstream' into 122-external-node-classifier