PacketBuffers are 16k minimum sizes, using FastAlloc. All calling paths to PacketBuffer creation now pass a size hint if known. P2PNetworkTest improved in many ways, errors go to TraceEvents instead of stdout, error counts are reported in stats, range min/max parameters are combined into "min:max" strings, new options to "stutter" connections by delaying randomly before socket read or write, message size to send is now configured separately for incoming vs outgoing sessions.