[querystring] avoid Object.prototype conflicts including `proto`#5650

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WebReflection wants to merge 5 commits intonodejs:masterfrom

WebReflection:master

Commits on Mar 10, 2016

avoiding any sort of possible conflict with the Object.prototype
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Commits on Mar 11, 2016

made __proto__ test working via JSON.parse
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Commits on Mar 14, 2016