[issue8800] add threading.RWLock

[Kristján Valur Jónsson]

Changes by Kristján Valur Jónsson <kristjan at ccpgames.com>:


Removed file: http://bugs.python.org/file27430/socketserver.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8800>
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