test_ssl.py: copy all new tests and updates from Python 2.7 (but make it pass on older versions too)

fix test__socket.py to expect SSLSocket to raise SSLError in case of timeout rather than socket.timeout

ssl: raise SSLError in case of timeout, never raise socket.timeout (this is how standard ssl behaves)

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)