patches: make Shared.DC.Scripts.Bindings and ZPublisher.BeforeTraverse.MultiHook new-style classes
This backports parts of zope commit bb7837c66 (Explicitly make all classes new-style., 2017-09-15) and 173658008 (Fix unpickling of instances those base class changed to a new-style class. (#208), 2017-10-24). This is done for two reasons: - so that business template XML are same when exported from zope4 and from zope2 - so that a business template created from zope4 can still be installed on zope2.
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