[docs] [issue8617] Better document user site-packages in site module doc

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


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keywords: +patch
Added file: http://bugs.python.org/file22498/pep370-doc.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8617>
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