[SkyBlade1978]

Imported vanilla ore rules now respect Manage Vanilla Ores. With it off, Minecraft keeps its normal ore placement. With it on, the imported settings apply without a second Minecraft or OreSpawn default pass.

Existing chunks and saved settings are preserved. This bumps the 1.12.2 release to 4.1.2.112021 and updates the migration and player guides.

The checks cover fresh generation, upgrades, reloads, source selection and Base Metals/Mineralogy. The full build, Javadocs, Eclipse and artifact checks pass.

[CLAassistant]

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