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.

Patch by SilentGhost.

OS X installers now includes a link to the installed documentation
plus another in the framework share/doc directory.

OS X installers no longer includes an Extras directory.  The Tools
directory is now installed in the framework under share/doc.

Issue 10971: Make test_zipimport_support once again compatible with refleak hunting (reviewed by Georg Brandl)

[commit during RC with Brett's approval]