[Zope] Fix broken python on Mac OS X version 10.2

sorry for the crossposting, here's a little heads-up for the mac OS X crowd: upon upgrading to 10.2 (jaguar) you will most likely find that your python binary (along with most other self-compiled software) is broken. in the case of python a simple re-build (if you compiled from source, that is) fixes this. i added explicit instructions to the "Zope and Python on Mac OS X" HowTo at http://www.zope.org/Members/jens/docs/zope_osx i highly recommend re-building zope after that as well. jens