ssl: make send return 0 in case of non-blocking/timeout instead of raising timeout (this is how standard ssl behaves)

Python Issue #5238: Calling makefile() on an SSL object would prevent the underlying socket from being closed until all objects get truely destroyed. Patch by Antoine Pitrou.

from http://svn.python.org/view?view=rev&revision=80428

Python Issue #5103: SSL handshake would ignore the socket timeout and block indefinitely if the other end didn't respond. Patch by Antoine Pitrou.

from http://svn.python.org/view?view=rev&revision=80452

When calling getpeername() in SSLSocket.__init__, only silence exceptions caused by the "socket not connected" condition. Patch by Antoine Pitrou.

from http://svn.python.org/view?view=rev&revision=80507

- add __implements__, __extensions__ and __imports__
- do not add 'ssl' and 'sslerror' to __all__ if on Python >= 2.6
- add 'SSLType' to __all__ if on Python <= 2.5

core: make _input_buffer and _output_buffer attributes of http_request class public (to simplify debugging)

core: make http._requests attribute public (to simplify debugging, not because it made it into public interface)

currently it has no effect because there are not 'long' constants but I'd like not to depend on that.

test_threading_2.py: make sure we use gevent in spawned subprocesses as well; this fixes a number of failures

socket: fix typo and possible NameError in connect_ex: it should be EAGAIN, not EGAIN. Patch by Alexey Borzenkov.