#11249: in PyType_FromSpec, copy tp_doc slot since it usually will point to a static string literal which should not be deallocated together with the type.

Patch reviewed by Raymond Hettinger, permission from Georg Brandl to commit
during an RC.

#941346: Fix broken shared library build on AIX. Patch by Sebastien Sable, review by Antoine Pitrou.

Reviewed by Georg Brandl.

Reviewed by Georg Brandl.

reverting r88395 and r88387 as per http://mail.python.org/pipermail/python-dev/2011-February/108005.html

In different occasions close() might be called more than once, causing problems with already disconnected sockets/dispatchers.

Fixed issue11082 - Reject str for POST data with a TypeError. Document the need to explicitly encode to bytes when using urlencode.