[issue6715] xz compressor support

[Per Øyvind Karlsen]

Per Øyvind Karlsen <peroyvind at mandriva.org> added the comment:

Not meaning to sound petty, but wouldn't it be common etiquette to retain some original copyright notice from original code intact..?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6715>
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