changes:
Openturf now uses ~200 MB less memory when sunlight is enabled.
Openturf now handles recursive OO copy better.
Lighting objects now update their existing color list if they can instead of creating a new one each time.
The sun can no longer fall out of the sky.
Openturfs should be a little gentler on clients.
Openturf darkening factor can be more easily changed.
Reset-Openturfs no longer hangs SSgarbage.
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