[docs] Link to PyCrypto

[Henrik Holm]

Hi, there's a link to PyCrypto on your documentation page "14.
Cryptographic Services" (http://docs.python.org/library/crypto.html)
This points to Kuchling's original package, on version 2.0.1.
PyCrypto has apparently been taken over by someone else, so I'd
suggest changing the link to https://launchpad.net/pycrypto .

Thanks,
Henrik Holm

-- 
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