knows if 2.5.1 is going to come out in time for the release.
Also add my patch to fix setuid support (not used by default) and
set our own version string to distinguish this from an "official"
Zope release.
- regress
- add zope-instance relative path support
- do optimizing compile on python files too, like lang/python, and use optimized in default zope-instance start script