Depending on how the JVM is configured and how rapidly chunks can load, the /cleanlight command would sometimes stall during the loading chunks phase. This is now fixed. Other changes:

• When a world is unloaded, operations for that world are cancelled too. Worlds are no longer loaded when the server restarts if there are pending operations for it.
• Optimization for cubic-chunks to skip listing regions on disk when using the 'loaded' option, it just checks the loaded chunk slices
• Now adjusts to radius-based permissions when doing a no-radius-arg /cleanlight command, rather than forcing it by server view distance