@unittest.skipUnless(ssl, '...') doesn't work because the class body uses the
nntplib.NNTP_SSL attribute which doesn't exist.

* Rename check_socket_and_wait_for_timeout() to PySSL_select()
* PySSL_select() is now clearly splitted betwen poll() and select()
* Add empty lines for readability

* Use the new _PyTime_FromSeconds() function to set the timeout to -1 second
  for socket.settimeout(None). It avoids a special case in internal_select()
  because of a rounding issue: -1 nanosecond is rounded to 0 millisecond which
  means non-blocking, instead of blocking.
* Check if the interval the negative in sock_call_ex() instead of doing the
  check in internal_select(). sock_call_ex() remembers if the socket has a
  timeout or not, which avoids a race condition if the timeout is modified in a
  different thread.

Fix also _Py_InitializeEx_Private(): initialize time before initializing
import, import_init() uses the _PyTime API (for thread locks).

Made test XML files non-ASCII.

Made test XML files non-ASCII.

arbitrary precision integers added in Tcl 8.5.

arbitrary precision integers added in Tcl 8.5.

store the result of sendto() instead of the C int type.

(The bug was already fixed in the default branch, but differently.)

result of sendto() instead of the C int type.

See the PEP 475 for the rationale.

sock_call_ex() gets the socket error code when the socket function fails.
sock_connect_impl() didn't set the error correctly.

instead of raising InterruptedError if the connection is interrupted by
signals, signal handlers don't raise an exception and the socket is blocking or
has a timeout.

socket.socket.connect() still raise InterruptedError for non-blocking sockets.

Patch by Martin Panter.

Patch by Martin Panter.

Patch by Cédric Krier.

sock_send_impl()