[Bug #1164912] Ensure Datetime wrapper class .value attribute is an 8-bit string, not a Unicode string

asked to read tens of megabytes of data.  On my Mac, it hits MemoryErrors
when reading around 15Mb in one chunk.  The fix is to read the body in several
parts, not as one big piece.

It would be nice to fix the underlying socket.read() problem, too.

2.4 bugfix candidate.

Remove sorting HOWTO, after converting it to a wiki page at http://wiki.python.org/moin/HowTo/Sorting

bad link in XML-RPC documentation

bug #1365984: urllib and data: URLs. Problem was that cStringIO objects cannot be assigned attributes on the fly.

Also set _XOPEN_SOURCE to 500.
Will backport to 2.4.

and decode methods to the documentation of the default error handlers.

invoking the Python interpreter (which didn't work on non-english Windows
versions). Check return codes instead.

Cleanup a bit more references so test_urllibnet is stable (test_urllib2 is sometimes stable, at least in isolation)

Delete globals which contain variable information at the end of the test.
This makes the test stable (no reported leaks) when running regrtest -R
to find reference leaks.

so it is only executed once.  Otherwise the same search function is
repeated added to the codec search path when regrtest is run with -R
and leaks are reported.