The previous implementation used execv(2) to run the real interpreter, which means that
you cannot use the arch(1) tool to select the architecture you want to use for a
universal build because that only affects the python/pythonw wrapper and not the actual
interpreter.

The new version uses posix_spawnv with a number of OSX-specific options that ensure that
the real interpreter is started using the same CPU architecture as the wrapper, and that
means that 'arch -ppc python' now actually works.

I've also changed the way that the wrapper looks for the framework: it is now linked to
the framework rather than hardcoding the framework path. This should make it easier to
provide pythonw support in tools like virtualenv.

/usr/local by default. Users can still choose to install files into /usr/local, but by
default we'll only install files in /Library/Framework/Python.framework and
/Applications/Python X.Y/

for the machine ("i386" or "ppc"), even if the executable is
64-bit.

This patchs ensures that the distutils platform architecture
represents the architecture for the executable when running a
64-bit only executable on OSX.

for bug report and patch.

pymath.c to Modules/_math.c.

Thanks Case Van Horsen for the patch.

use new-style formatting.  Thanks Florent Xicluna for the patch.

self-test.  Because of a change to the way tracebacks are printed,
this self-test was failing.  The test is run (and passes) during normal
regression testing.  So instead of running the failing self-test this
patch makes doctest emit a usage message.  This is better behavior anyway
since passing in arguments is the real reason to run doctest as a command.

Bug discovery and initial patch by Florent Xicluna.

it to do the conversion explicitly instead.  See issue #7550.

Refactored HTTPHandler tests and added testcase for proxy authorization.