Chunk limit for Falling_Block type.

[samparotony228]

Hello, I would like to suggest a feature for Purpur, it is to be able to limit the Falling_Block type physics for a chunk. (let's say for 1 chunk this type of blocks will take physics for 10 blocks, the rest will not fall, because the limit.) For example, a player puts a layer of cobwebs and a layer of sand on top, the sand starts to pour and causes more lag on the server. In addition, it goes through the web, which also creates large server lags.