RFR: 8314180: Disable XPath in XML Signatures

[Weijun Wang]

On Tue, 10 Jun 2025 12:29:24 GMT, Sean Mullan <mullan at openjdk.org> wrote:

> The XPath Transform is rarely used, introduces complexity, and is not recommended by the [XML Signature Best Practices](https://www.w3.org/TR/xmldsig-bestpractices/) document. Applications should use the XPath Transform 2.0 Filter instead, which was designed to be an alternative to the XPath Transform. This change will disable the XPath Transform by default.

Marked as reviewed by weijun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25721#pullrequestreview-2920998704