PEP 517: Clarify config_settings section

[abitrolly]

Because it is hard to implement in current form

pypa/setuptools#2491 (comment)

[the-knights-who-say-ni]

Hello, and thanks for your contribution!

I'm a bot set up to make sure that the project can legally accept this contribution by verifying everyone involved has signed the PSF contributor agreement (CLA).

Recognized GitHub username

We couldn't find a bugs.python.org (b.p.o) account corresponding to the following GitHub usernames:

@abitrolly

This might be simply due to a missing "GitHub Name" entry in one's b.p.o account settings. This is necessary for legal reasons before we can look at this contribution. Please follow the steps outlined in the CPython devguide to rectify this issue.

You can check yourself to see if the CLA has been received.

Thanks again for the contribution, we look forward to reviewing it!

[brettcannon]

Please discuss any proposed changes at https://discuss.python.org/c/packaging/14 first.

[abitrolly]

Maybe I will have the time next week to copy paste diffs from GitHub to that forum.

[abitrolly]

Well, it didn't happen, and I don't remember what was the story, so if anybody wants to see this fixed, do not rely on me starting the thread on https://discuss.python.org/c/packaging/14