Don't tie installPackage to a layer.

monkey-patch

This code is taken from the encodings module of Python 2.4.
Note that this code is originally (C) CNRI and it is possibly not compatible
with the ZPL and therefore should not live within svn.zope.org. However this
checkin is blessed by Jim Fulton for now. The fix is no longer required with
Python 2.5 and hopefully fixed in Python 2.4.6 release.

  a complete Zope instance

that XML export/import is partly broken

        Timezones() returns a copy of the timezone list (allows tests to run).

(test comes later)

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        for sending a mail immediately by-passing the zope.sendmail delivery
        mechanism

o The rules specified by setuptools for such packages required that there
  be no code in the pacakge __init__.py other than that which sets up the
  namespace.  Adjusted all Zope-internal code which assumed that the
  '__ac_permissions__' tuple would be present unconditionally.

Changed 'fast_listen' zope.conf option to 'fast-listen'.

Merged the slinkp-datetime-200007 branch: fix the DateTime(anotherDateTime) constructor to preserve timezones.

o This branch will *not* be merged to the 2.11 line, but *will* be merged
  to the trunk.

o Third-party products which depend on 2.11 but would like to start removing
  Z2 interfaces themselves can use this branch for testing.