Closes #17602: Adds a readline implementation for the Windows console

Issue #26058: Add a new private version to the builtin dict type, incremented
at each dictionary creation and at each dictionary change.

Implementation of the PEP 509.

Issue #21201: Improves readability of multiprocessing error message from server to client for certain exceptions

Issue #21201: Improves readability of multiprocessing error message from server to client for certain exceptions

Patch by Emanuel Barry, reviewed by Serhiy Storchaka and Martin Panter.

Issue #27350.

Issue #27350.

Issue #27350.

Issue #27350.

Issue #27350.

And most of the tools.

Patch by Emanual Barry, reviewed by me, Serhiy Storchaka, and
Martin Panter.