[issue16261] Fix bare excepts in various places in std lib

[Martin Panter]

Martin Panter added the comment:

I reviewed the patch on Reitveld. All of the changes that do not have comments look okay to me, although some will definitely have merge conflicts with the current code. If someone updated the patch based on the comments, I think it may be okay to commit.

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nosy: +vadmium
stage:  -> needs patch

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<http://bugs.python.org/issue16261>
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