Log Message:
Update zope211 package to 2.11.1.

  Zope 2.11.1 (2008/07/17)

    Bugs Fixed

      - Suppressed DeprecationWarning during import of ZPublisher.Iterators:
        that module needs to use Z2-style interfaces in 2.11, for BBB, but
        the Interface module itself issues the warning on import.

      - Launchpad #246748: added 'immediate' option to sendXXX() methods
        for sending a mail immediately by-passing the zope.sendmail delivery
        mechanism

      - Launchpad #246290: fixed backward compatibility issue

      - zope.testing : updated to 3.5.3

      - Launchpad #245649:  the Products package is now a proper
        "namespace package" under the rules specified by setuptools.

      - zope.viewlets: updated to 3.4.2

      - zope.sendmail: updated to 3.5.0 (fixing Launchpad #230831)

      - Launchpad #239636:  Ensure that HEAD requests lock an empty body
        for NotFound errors.

      - fixed outdated transaction.commit(1) call in
        ZODBMountPoint.SimpleTrailblazer