the only use for this class is to facilitate random runtime plugin loading, and it's not complete even for that purpose.
Since nothing but PM uses pocketmine/classloader anyway, it doesn't make sense to have it outside the core. As with LogPthreads, it's just adding more maintenance work.
this is now supported thanks to the object rescue feature implemented in pthreads 5.1, making returning of thread-safe values from async tasks possible.
This needs to be explicitly supported, since otherwise it will attempt to serialize them, which isn't supported anymore.
this avoids needing to call Terminal::init() before starting a MainLogger. Since it inits the formatting codes anyway when log messages are first recorded, it shouldn't be necessary to pre-initialize it.
regardless of how long an async task takes to run, it will take a multiple of 50ms to get the result processed. This delay causes issues in some cases for stuff like generation, which causes locking of adjacent chunks, and async packet compression, which experiences elevated latency because of this problem.
This is not an ideal solution for packet compression since it will cause the sleeper handler to get hammered, but since it's already getting hammered by every packet from RakLib, I don't think that's a big problem.
