nov 3, 2021 - Snapshot 21w44a

Description:

New world generation is now inserted under existing chunks when upgrading a world to the new world height.
Added an Online options screen where you can now find the Realms Notifications option and Difficulty when on a server.
Added an "Allow Server Listings" option to opt out of having your name displayed in server listings.
Servers can now set property to hide-online-players to true in order to not send a player list on status requests.
When JFR profiling is started from an external source, the JFR events for network packets are now aggregated instead of one event per packet.
Sleeping now only resets the weather cycle if it was raining.
Blocks and fluids are now also affected by simulation distance.
Optimized entity collisions.

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