LP #583702: Fixed regressions in mailhost queue processor code introduced in 2.12.6 in the LP #574286 changes.

  debugger still referred to the toplevel module ``Zope``, which was
  renamed to ``Zope2`` a long time ago.

  views.

Suppression using ``os.environ`` still works.

Fixes LP #142878.

Coverage for 'Products.SiteAccess.SiteRoot.Traverser'.

E.g., 'bin/test --all -s Products.SiteAccess'.

  directive.

  is missing the indexed attribute, if determining the value raises
  AttributeError, or of the indexed attribute is empty.

  methods could not deal with ``TaintedString`` instances. Removed the
  entirely redundant ``DTMLDocument.manage_edit`` method at the same time.

  to avoid issues when creating two VirtualHostMonsters in the same
  container the VirtualHostMoster now has a default Id. It can no longer
  be selected, and the intermediary Add view is gone.