Fix the last test_ssl failure (test_protocol_sslv2) for CPython 2.7.8 and .9. In python Issue 20207, the SSLv2 protocol was disabled by default, and thus the test was changed to expect a failure (see https://github.com/python/cpython/commit/65f2fdce200b800bd95ac6690e9654afc37897c6).  Match that change.

The same flush calls that were needed for PyPy are needed to make CPython's test__pywsgi tests pass.

Tested under Python 2.7.8 and all the test_ssl tests pass, EXCEPT for:
-- test_algorithms. That test is disabled in the 2.7.8 sourcecode, so disable it here;
-- test_protocol_sslv2, which fails with the same EOF error as described in the last commit for 2.7.9.

Fixes several test failures under 2.7.9, notably test__pywsgi and test__ssl.
There are lots of whitespace differences in the tests due to forking for CPython
<= 2.7.8.

The complete failure list follows.

The ONLY failure in 2.7/test_ssl has this traceback; I'm not sure what the cause is yet:

  ======================================================================
  ERROR: test_protocol_sslv2 (__main__.ThreadedTests)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "test_ssl.py", line 71, in f
      return func(*args, **kwargs)
    File "test_ssl.py", line 1205, in test_protocol_sslv2
      try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_SSLv23, True)
    File "test_ssl.py", line 979, in try_protocol_combo
      chatty=False, connectionchatty=False)
    File "test_ssl.py", line 909, in server_params_test
      s.connect((HOST, server.port))
    File "/gevent/gevent/_sslgte279.py", line 546, in connect
      self._real_connect(addr, False)
    File "/gevent/gevent/_sslgte279.py", line 537, in _real_connect
      self.do_handshake()
    File "/gevent/gevent/_sslgte279.py", line 504, in do_handshake
      return self._sslobj.do_handshake()
  SSLEOFError: EOF occurred in violation of protocol (_ssl.c:581)

  ----------------------------------------------------------------------

3/123 expected failures
 - //bin/python -u -m monkey_test test_ssl.py
 - //bin/python -u test__socket_dns6.py
 - //bin/python -u -m monkey_test --Event test_ssl.py

4/123 unexpected failures
 - //bin/python -u test__all__.py
 - //bin/python -u test_ares_timeout.py
 - //bin/python -u -m monkey_test test_httpservers.py
 - //bin/python -u -m monkey_test --Event test_httpservers.py

Resolves #477.

In Python 2.7.9, we have new SSL interfaces, that are not quite
the old Python 2 interfaces, nor the same as the Python 3 interfaces.

This creates a new SSL module, _sslgte279.py, for Python 2 versions
greater than or equal 2.7.9, ported from Python 2.7.9's ssl.py:
https://hg.python.org/cpython/file/648dcafa7e5f/Lib/ssl.py.

The process of porting was done by starting with gevent's ssl3.py and
backporting Python 2.7.9's ssl.py.

Fixes these tests under Python 2.7.9:

 - /usr/local/bin/python -u -m monkey_test --Event test_urllib2net.py
 - /usr/local/bin/python -u -m monkey_test test_urllib2net.py
 - /usr/local/bin/python -u test__ssl.py

No new test failures. Still failing since 72119c8c:

 - /usr/local/bin/python -u -m monkey_test --Event test_ssl.py
 - /usr/local/bin/python -u -m monkey_test test_ssl.py
 - /usr/local/bin/python -u test__pywsgi.py
 - /usr/local/bin/python -u test__makefile_ref.py
 - /usr/local/bin/python -u test__socket.py
 - /usr/local/bin/python -u test___example_servers.py
 - /usr/local/bin/python -u -m monkey_test --Event test_ftplib.py
 - /usr/local/bin/python -u test__socket_ssl.py
 - /usr/local/bin/python -u -m monkey_test test_ftplib.py
 - /usr/local/bin/python -u test__all__.py

In addition, basic HTTPS requests were tested with urllib3==1.10.2
and requests==2.6.0.

Skip trying to build gevent for metadata requests

Fixes #490

Remove SSL3 entirely as default TLS level

upgrade pypy tests to 2.7.8

Fix #497.

upgrade libev to 4.19

update known_failures.py w.r.t PyPy upgrade

import socket on windows

https://bugs.pypy.org/issue1743 is fixed now, but other failures appeared.

Should fix #459. See https://github.com/gevent/gevent/issues/459#issuecomment-49506870

Thanks to @snaury.

This reverts commit 12e4fb18.

cythonpp.py: fix breakage on newer cython versions

Thanks to @zhangchunlin and @mvalkon.

Fix #483. Close #489.

Remove extra backtick

Markdown typo correction

peek() should return the same element that get() returns, which
is not currently the case.

Add regression test for queue peek().

Fix broken link in the Introduction doc

- bugfix for error: ISO C90 forbids mixed declarations and code in libev...

made gevent.corecffi buildable under 32 bit systems

- mark test__os.py as flaky on python-dbg
- remove test_queue.py and test__threading_vs_settrace.py from FAILING

To prevent this:

======================================================================
FAIL: test_terminate (__main__.TestPool10)
----------------------------------------------------------------------

Traceback (most recent call last):

File "test__threadpool.py", line 176, in test_terminate

assert kill.elapsed < 0.5, kill.elapsed

AssertionError: 0.564028263092041