XML LLSD security regression corpus
These inputs exercise the XML LLSD parser's entity boundary. DTD declarations,
external entities, and undeclared named entities must be rejected without file
or network access and without entity expansion. The structured-data unit tests
load every fixture directly. malformed_nesting.xml additionally covers
crossed container end tags, while truncated_scalar.xml guards against parser
loops when a scalar reaches end-of-input without a closing tag.