[asyncnet] Difference between a natural socket close and close(AsyncSocket)

[termer]

Calling `close` inline within the loop seems to work fine and produces the 
expected result. I'm guessing that the implementation is somehow in a deadlock, 
or is just not designed to handle a disconnection while waiting on data. 
Whatever the case, it seems to be impossible to disconnect a socket without 
making all `asyncnet` procs hang.