NNP Fluidlogging

Backported:

• visual fix for blocks that contain fluids but can't be waterlogged (not very visible in this version)
• data driven per-blockstate X fluidtype fluid level limits (upper and lower)
• flowing fluids can now emit light while logged
• performance improvement for updating chunks with lots of (non-vanilla) logged blocks

Probably going to call this "released" soon, unless folks start reporting problems. I don't see myself adding new features, and it's been a while since I encountered a significant bug.