test_importlib is that it discovers special little race conditions. For
instance, it turns out that importlib would throw an exception if two different
Python processes both tried to create the __pycache__ directory as one process
would succeed, causing the other process to fail as it didn't expect to get any
"help". So now importlib simply stays calm and just accepts someone else did
the work of creating the __pycache__ directory for it, moving on with life.

Closes issue #9572.

imports with an empty string in sys.path.

(part of #9657)

importlib._bootstrap, add the optional methods for importlib.abc.SourceLoader
for completeness.

variable the return value is assigned to is char *. Since the assigned-to
variable is never changed, simply make that a const char * and cast all calls
to get_history to const char * to silence the compiler warning (found with
LLVM).

getaddrinfo. Patch by David Watson.

(part of issue #9251)

ignored by the buffered IO layer anymore.

fix issue #9129: added proper error handling when accepting new connections in SMTPServer.handle_accept

Write test.support.workaroundIssue8611() function so it will be easier to
remove this workaround from all tests.

The test is still failing on "x86 FreeBSD 7.2 3.x" and "sparc solaris10 gcc
3.x" buildbots. It looks like the locale encoding is able to decode b'\xff'. I
suppose that it is an encoding like 'iso-8859-1'.

Use C locale to set, I hope, the locale encoding to 'ascii'. Display also the
encoding so if the test fails, at least I will learn the locale encoding
choosen for the C locale.

There are buildbot failures on "x86 FreeBSD 3.x" and "sparc solaris10 gcc 3.x".
I suppose that _Py_char2wchar() doesn't fail even if the locale encoding is
unable to decode the byte string, because _Py_char2wchar() has a special mode
for platform without mbrtowc() (ISO C99) function.

Let's check my theory by avoid error on the Python print() instruction.

Also remove one tab, and move a check closer to the possible failure.