Issue #10141: updated new usages of AF_CAN to be in #ifdef AF_CAN rather than #ifdef HAVE_LINUX_CAN_H to allow compilation on older Linuxes.

by multiprocessing.connection

multiprocessing.connection

OS/2 support in distutils

Initial patch by Alba Magallanes.

Enhance HTTPResponse.readline() performance

- Remove configuration settings from removed _sha3.vcxproj
- Don't try to build configurations of _testembed that don't exist
  (namely, PGInstrument and PGUpdate)

Only test the error handler. The encoding is not ASCII on Windows: it may the
OEM or ANSI code page.

to get LC_CTYPE constant on Windows.

:py:data:`sys.stdin` and :py:data:`sys.stdout` are now using the
``surrogateescape`` error handler, instead of the ``strict`` error handler.

* Tolerate 10 seconds instead of 3 seconds for slow test
* Faster test, use sleep of 100 ms instead of 1 sec
* Replace a number of iterations with an explicit deadline for the timeout

(Windows code page 65001, Microsoft UTF-8).