Add Support for Java 9 (10, 11)+ discovery in preparation for Forge 1.13

[dscalzi]

Forge 1.13 will support Java 9+, therefore we also need to support installations of these versions for 1.13+. Java 8 will remain our primary candidate for discovery and installation (at least until oracle starts hiding downloads behind a login).

All OS

Ensure the output of java -XshowSettings:properties has not changed. If it has, update accordingly.

Windows

The registry keys for Java 9+ have changed, we will need to add support for them.

MacOS + Linux

Tests need to be run to make sure installation directories and fs structure have not changed.

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https://docs.oracle.com/javase/10/install/overview-jdk-10-and-jre-10-installation.htm#JSJIG-GUID-8677A77F-231A-40F7-98B9-1FD0B48C346A

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No ETA on this. WesterosCraft is unlikely to update to 1.13 for at least another year, however the launcher should be made compatible as soon as possible. I would like to begin working on this by the time Forge 1.13 is available.

[dscalzi]

Preliminary support added. Java 9 + 10 are EOL and Oracle's JDK 11 is not free to use in production. This means we would need to use OpenJDK for 11+, which afaik does not have an installer. No installer = no registry keys = we don't need to bother with that on windows. As this gets closer to being relevant I'll run some more in depth tests to see what we need to support.

Java 9+ is still disabled for all versions until we test mod compatibility on a far-future 1.13 test server.

Changes untested on macOS and Linux.

[lpuv]

Is there any progress on this @dscalzi? Thanks

[dscalzi]

It is supported as described below: MC 1.7-1.16 = JDK 8 MC 1.17+ = JDK 17

via https://github.com/dscalzi/HeliosLauncher/pull/261

going to close this.