Really the whole API needs to be gone over to restore the
separation of concerns; but that's what email6 is about.

Issue #10762: Guard against invalid/non-supported format string '%f' on Windows. Patch Santoso Wijaya.

Fix also a compiler (gcc) warning.

time.time() and/or time.sleep() are not accurate on Windows, don't test them
in test_faulthandler. Anyway, the check was written for an old implementation
of dump_tracebacks_later(), it is not more needed.

on Windows.

to be wrapped in a TextIOWrapper.  Patch by Nadeem Vawda.

PCbuild/ changes (for VS project files, etc).

The thread must not receive any signal. If the thread receives a signal,
sem_timedwait() is interrupted and returns EINTR, but in this case,
PyThread_acquire_lock_timed() retries sem_timedwait() and the main thread is
not aware of the signal. The problem is that some tests expect that the main
thread receives the signal, not faulthandler handler, which should be
invisible.

On Linux, the signal looks to be received by the main thread, whereas on
FreeBSD, it can be any thread.