Harden DocxReport and DOMUtils XML parsers against XXE#735
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Route DocxReport.onBeforePreprocessing and DOMUtils.load through a shared hardened factory and disallow DOCTYPE in SAXXDocPreprocessor. Adds a regression test. Fixes opensagres#734.
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Route DocxReport.onBeforePreprocessing and DOMUtils.load through a shared hardened factory and disallow DOCTYPE in SAXXDocPreprocessor. Adds a regression test. Fixes #734.