RFR: JDK-8307807 Replace use of System.getProperty("os.name") with PlatformUtil calls

[Nir Lisker]

On Thu, 11 May 2023 14:57:31 GMT, Carl Döbbelin <duke at openjdk.org> wrote:

> I cannot use the PlatformUtils in the `com.sun.webkit.network.URLLoader` class, as the PlatformUtils are not Exported to the corresponding module.

I wonder if this was done on purpose.

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PR Comment: https://git.openjdk.org/jfx/pull/1132#issuecomment-1544229212