[issue19478] Add ability to prefix posix semaphore names created by multiprocessing module

[Ned Deily]

Ned Deily added the comment:

I don't have any experience using OS X sandboxing yet but I wonder whether there are other instances of semaphores or other resources used elsewhere in the standard library that would benefit from a common solution.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19478>
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