Speed up with statements by storing the __exit__ method on the stack instead of in a temp variable (bumps the magic number for pyc files)

SocketServers. The core of the patch was written by Pedro Werneck, but any bugs
are mine. I've also rearranged the code for timeouts in order to avoid
interfering with the shutdown poll.

permission to create files in the root directory.
Will backport to 2.5.

versions.

compatibility with PEP3118.

calls (which don't exist on non-Unix platforms).

Thanks to Trent Nelson for the report and patch.

before timing out.  This doesn't change the duration of the test under
normal circumstances.  This is targetted at fixing the spurious failures
on the FreeBSD buildbot primarily.

should prevent a failure in tearDown masking any real test failure.

Patch from Trent Nelson.  (I can't test this.)

Patch from Trent Nelson.  Also simplified removing a file by using test_support.

would give bogus error messages, because of untested exceptions::

    >>> f(**g(1=2))
    XXX undetected error
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: 'int' object is not iterable

instead of the expected SyntaxError: keyword can't be an expression

Will backport.