[$] Progress in wrangling the Python C API

There has been a lot of action for the Python C API in the last month or
so—much of it organizational in nature. As predicted in our late September article on using the 'limited'
C API in the standard library, the core developer sprint in October was the
scene of some discussions about the API and the plans for it. Out
of those discussions have come two PEPs, one of which describes the API,
its purposes, strengths, and weaknesses, while the other would establish a C
API working group to coordinate and oversee the development and maintenance
of it.