Get a python.org subdomain

[qwcode]

packaging.python.org?

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migrated from https://bitbucket.org/pypa/python-packaging-user-guide/issue/42

[ncoghlan]

@kantrn, @dstufft I'm currently working on the docs.python.org updates, and it would be good to have a real subdomain to link to. The RTFD link will do as a placeholder, but I'd prefer to have packaging.python.org in place for 3.4 final.

[dstufft]

He's @coderanger on github.

[dstufft]

Do we want to host this on infra, or do we just want to point a domain at RTD?

[dstufft]

https://packaging.python.org/en/latest/