Patch by Davin Potts.

time bytes are received or sent. The socket timeout is now the maximum total
duration of the method.

This change fixes a denial of service if the application is regulary
interrupted by a signal and the signal handler does not raise an exception.

each time data is sent successfuly. The socket timeout is now the maximum total
duration to send all data.

This changeset does two things: introduces a new RemoteDisconnected exception
(that subclasses ConnectionResetError and BadStatusLine) so that a remote
server disconnection can be detected by client code (and provides a better
error message for debugging purposes), and ensures that the client socket is
closed if a ConnectionError happens, so that the automatic re-connection code
can work if the application handles the error and continues on.

Tests are added that confirm that a connection is re-used or not re-used
as appropriate to the various combinations of protocol version and headers.

Patch by Martin Panter, reviewed by Demian Brecht.  (Tweaked only slightly by
me.)

the wait is cancelled, the future *fut* is now also cancelled.

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.

Based on patch by Rafik Draoui.

or nested classes) now are supported with pickle protocols < 4.

Tests by Jessica McKellar.

Selector.select() is now retried with the recomputed timeout when interrupted
by a signal.

Write an unit test with a signal handler raising an exception, and a unit with
a signal handler which does not raise an exception (it does nothing).

timeout when interrupted by a signal, except if the signal handler raises an
exception. This change is part of the PEP 475.

The asyncore and selectors module doesn't catch the InterruptedError exception
anymore when calling select.select(), since this function should not raise
InterruptedError anymore.

Also deprecate the undocumented set argument instead of removing
it already in 3.5.

Initial patch by Demian Brecht.

add a version changed note in modified functions.

creation) mode.