Add tests for invalid format specifiers in strftime, and for handling of invalid file descriptors in the os module.

to better describe the signed vs unsigned return value behavior on
different platforms and versions of python.  Mention the workaround to
make them all return the same thing by using & 0xffffffff.

Fixes issue4903.

Also needs to be merged into release26-maint, release30-maint, & py3k.

  biarch systems. Try to rely on ldconfig only, without using objdump and gcc.

Minor documentation changes cross-referencing NullHandler to the documentation on configuring logging in a library.

collecting the oldest generation) so that allocating lots of objects without
destroying them does not show quadratic performance. Based on a proposal by
Martin von Löwis at http://mail.python.org/pipermail/python-dev/2008-June/080579.html.

Add test cases and documentation

Issue 4336:  Let users of HTTPConnection.endheaders() submit a message body to the function if required.

Issue 4336:  HTTPRequest._send_output() now deals with the case of the message body not being a string.  This allows clients to use endheaders(message_body) instead of endheaders() + send(message_body) without making any extra checks.