mailman needs more extensive sys.path hacking

[Barry Warsaw]

At the top of Mailman's mm_cfg.py file, we have this bit of sys.path hackery:

# Set up Mailman's sys.path to pick up the top of Launchpad's tree
import sys
sys.path.insert(0, '/home/barry/projects/launchpad/pristine/lib')

this is no longer enough though, because e.g. zope.i18nmessageid is no longer in lib, it's an egg. So it fails with an import error in mm_cfg.py trying to import canonical.launchpad.mailman.monkeypatches.defaults

We need to extend the sys.path hacking here to ensure that all the eggs are on sys.path as well. Probably importing _pythonpath will do it.

[Barry Warsaw (barry)]

Don't forget though that mm_cfg.py is autogenerated from the template in lib/canonical/launchpad/mailman/monkeypatches/__init__.py so the hack must be added there.