RFR: JDK-8280373: Update Xalan serializer / SystemIDResolver to align with JDK-8270492

Tue Jan 25 08:33:22 UTC 2022

On Thu, 20 Jan 2022 23:32:33 GMT, Joe Wang <joehw at openjdk.org> wrote:

> Thanks Alan for the reminder. The change looks good. Please add a copyright header and the LastModified tag as the other class did.

Hi, I added the header and LastModified.
Best regards, Matthias

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PR: https://git.openjdk.java.net/jdk/pull/7155