[docs] [issue22341] Python 3 crc32 documentation clarifications

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

crc & 0xffffffff is still used in gzip, zipfile and tarfile. And some comments say about signess of 32-bit checksums.

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nosy: +serhiy.storchaka

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<http://bugs.python.org/issue22341>
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