Log Message:
py-cheroot: updated to 6.5.8

v6.5.8
- :issue:`222` via :commit:`621f4ee`: Fix
  :py:const:`socket.SO_PEERCRED` constant fallback value
  under PowerPC.

v6.5.7
- :issue:`198` via :commit:`9f7affe`: Fix race condition when
  toggling stats counting in the middle of request processing.
- Improve post Python 3.9 compatibility checks.
- Fix support of `abstract namespace sockets
  <https://utcc.utoronto.ca/~cks
  /space/blog/linux/SocketAbstractNamespace>`_.