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Reinstate requestmethod doctest-as-unittest integration file, using zope.testing.doctest's backport of DocFileSuite.

- Python 2.3 doesn't support the @decorator syntax
- Owner.py methods weren't protected

Also, python 2.3's doctest module doesn't have any unittest integration,
just remove the test_requestmethod.py glue.

- Protect various security-setting-mutators with this decorator.

revert ZCatalog.getobject() semantics not to mask traversal errors and not to fallback to .resolve_url() when the traversal result is None

publish_module. Thanks to Andreas Zeidler.

2.9, which was not in fact vulnerable).

'__getstate__' of a broken instance.

- Fixup usage of urljoin in webdav.davcmds

      - reStructuredText/ZReST: setting raw_enabled to 0 for security
        reasons

- removed deprecation warnings added in Zope 2.8.5 (the warning period starts in Zope 2.9.0)