Send a Packet103SetSlot to client when a BlockPlaceEvent is cancelled.
Fixes BUKKIT-5284
Currently, whenever a player places a block in a protected area the
equipped itemstack size on client is never updated properly since the
client thinks the block was placed. The reason this happens is because
ItemStack.matches returns true since the server does not decrement stack
size if a BlockPlaceEvent is cancelled. This causes
PlayerConnection.a(handlePlace) not to send the appropriate packet to
client which causes the bug.
Update chest animation after cancelling InventoryOpenEvent. Fixes BUKKIT-1440
Currently if a plugin cancels an InventoryOpenEvent for vanilla chests,
the chest animation for clients is stuck in the open state since
IInventory's closeChest method is never called. To fix the issue, closeChest
is called before exiting the display GUI method.
More info can be found here
https://bukkit.atlassian.net/browse/BUKKIT-1440
Entity.teleportTo is largely stable and correct. CraftEntity.teleport,
however, still cannot properly handle cross-world teleportation. Fix it
to defer to the better code in core Minecraft.
Commit c576054539790bdeb35285f62863d74b48c0782d removed the chunklist collection stored in ChunkProviderServer, however it has been partially restored in some places by 7e1ac0a77129b169704c1e222ff2deb3ab6cd2d2. As not all references to this were restored, this has caused the chunklist and chunks collections to become out of sync, resulting in a memory leak.
There is very little reason to keep track of Mineshafts as the only persistent behaviour within them is through the use of mob spawners, which are of course stored within the map itself. As such we can disable them from being saved, indefinitely, until there is reason to do so.
This brings back the option that the Spigot version of netty saw. By default Netty will try and use cores*2 threads, however if running multiple servers on the same machine, this can be too many threads. Additionally some people have 16 core servers. If 32 Netty threads are allowed in this setup, then the lock contention, and thus blocking between threads becomes much greater, leading to decreased performance.
