the Ctrl-C signal handler on Windows

Patch by Serhiy Storchaka.

Patch by Jakub Wilk.

If messages were only added, a new file is no longer created and
renamed over the old file when flush() is called on an mbox, MMDF or
Babyl mailbox.

(helps getting results in real-time when stdio is transmitted over a pipe or socket)

Patch by Stefan Mihaila.

python executable

The __os_install_macro defines some post-processing activities during an rpm
build; one of the scripts it calls is brp-python-bytecompile, which can take
an argument: the python executable with which to byte-compile .py files in the
package payload.

In some older versions of rpm (e.g. in RHEL 6), this invocation doesn't pass
in an argument, and brp-python-bytecompile defaults to using /usr/bin/python,
which can lead to the .py files being byte-compiled for the wrong version of
python.  This has been fixed in later versions of rpm by passing in
%{__python} as an argument to brp-python-bytecompile.

Workaround this by detecting if __os_install_post has a 0-argument invocation
of brp-python-bytecompile, and if so generating an equivalent macro that has
the argument, and explicitly provide the new definition within the specfile.

to using signal.alarm(1) instead of signal.setitimer(signal.ITIMER_REAL, 0.1).

This is an attempt to see if this change is what caused the ubuntu arm buildbot
to hang in test_io's test_interrupted_write_retry_text.
Discussion in Issue #12268.

no longer lose data when an underlying read system call is interrupted.
IOError is no longer raised due to a read system call returning EINTR
from within these methods.

alarm for the signal tests.

Issue #15142: Fix reference leak when deallocating instances of types created using PyType_FromSpec().

Issue #12965: Clean up C-API docs for PyLong_AsLongLong(AndOverflow); clarify that __int__ will be called for non-PyLongs

Issue #12965: Clean up C-API docs for PyLong_AsLong(AndOverflow); clarify that __int__ will be called for non-PyLongs

mktime() when timezone offest is supplied.

Loosely based on the work by Hirokazu Yamamoto.