make sure that the browser:view directive doesn't clobber security declarations for attributes which are not included in allowed_attributes or allowed_interface but which already have security declarations in a base class's security info. This is needed to provide access to, e.g., restrictedTraverse on views that subclass Traversable

  indexable value for an object in PluginIndexes.common.UnIndex

  specific listening IP is configured for the HTTP server, do a
  socket lookup to show the current server's fully qualified name.

  which prevented renaming files and folders via FTP.

  exceptions encountered during path traversal.

  url_quote_plus and url_unquote_plus to handle unicode strings.

This version of mailer.py is the same as the one in zope.sendmail, modulo some whitespace changes and not all error handling from z.s being present.  It should therefore be safe to make this a deprecated alias.

merge branch gotcha-LP143531

LP #578326: Issue a warning if someone specifies a non-public permission attribute in the browser:view directive. This attribute has never been supported in Zope 2. This should at least make it obvious where people might have been relying on false security assumptions.

Also makes the intent clearer.