[PATCH v5 0/2] MR10225: Draft: libs/xml2: Tolerate embedded XML declarations inside elements.

[lucas (＠luben93)]

Windows MSXML tolerates nested <?xml?> processing instructions inside
elements, but libxml2 rejects them with XML_ERR_RESERVED_XML_NAME.

When an embedded <?xml is encountered inside an element, consume
everything up to the parent's closing tag and emit it via the SAX
characters callback as a text node, matching Windows MSXML behavior
where the content after the embedded <?xml?> is treated as text.

This is needed for applications like Adobe Creative Cloud installer
that use embedded XML declarations in their data.

--
  v5: msxml3/tests: Add tests for embedded XML declarations inside elements.
      libs/xml2: Tolerate embedded XML declarations inside elements.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10225