Find a good way to deal with event loss

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With UDP, messages get lost. TCP however, would introduce unpredictable delays. 
Implement something like a thin security layer that makes the protocol more 
reliable without adding delay, eg running message numbers for figuring out 
message order and ACKs to ensure a packet arrived.

Original issue reported on code.google.com by [e-mail] on 16 Jan 2011 at 10:53