Restore License Classifier

[WilliamRoyNelson]

Summary of changes

Partially reverts
4e1e893

Which removed all license declarations from the project without adding a proper SPDX identifier.
#4901 has a discussion on what the new license declaration should be, but until that's resolved, this restores the old license declaration so that automated tools do not reject setuptools as having no license.

Closes #4956

Pull Request Checklist

• Changes have tests
• News fragment added in newsfragments/.
  (See documentation for details)

[WilliamRoyNelson]

Assuming this is all correct, I'd very much appreciate a release with the hopes of resolving any license issues from users who depend on enterprise tools that check for license declarations.

[wagenrace]

I tested this by doing pip install . in your repo and run license_scanner afterwards. Setuptools went back from UNKNOWN to MIT
This PR will fix it for license_scanner and issue wagenrace/license_scanner#26

[WilliamRoyNelson]

@jaraco
I hate to be a nag, but the latest release, 79.0.1 did not declare any license.

This is a very big problem for enterprise environments that use tools to prevent unlicensed software from being used.

It would mean a lot if you could restore the old license declaration before making additional releases.

[wagenrace]

@jaraco
I hate to be a nag, but the latest release, 79.0.1 did not declare any license.

This is a very big problem for enterprise environments that use tools to prevent unlicensed software from being used.

It would mean a lot if you could restore the old license declaration before making additional releases.

We are also adding setuptools to allowed package in license scanner just to make sure our pipelines pass

Do you know the process here? Approved does not mean it is merged, or can you now merge it?

[WilliamRoyNelson]

We are also adding setuptools to allowed package in license scanner just to make sure our pipelines pass

Do you know the process here? Approved does not mean it is merged, or can you now merge it?

I think it needs approval from one of the maintainers. I can't merge.

[mgiovani]

thanks for fixing this

[jaraco]

This setting is maintained at the skeleton level and probably shouldn't be customized here for Setuptools. There's nothing unique to Setuptools. I appreciate the PR, but I'd prefer to resolve the issue at the system level (skeleton in this case) or at least resolve the concerns and not simply revert an intentional change.