git: openjdk/jdk17u-dev: 8280373: Update Xalan serializer / SystemIDResolver to align with JDK-8270492

[Matthias Baesken]

Changeset: 7833c7d5
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2022-02-15 07:53:20 +0000
URL:       https://git.openjdk.java.net/jdk17u-dev/commit/7833c7d5bf458094ef40ffa847c07c12ee47445d

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

Backport-of: c180070cb59b8e075376ae913c5db9a4ed868303

! src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/utils/SystemIDResolver.java