UDP networking improvements and experiments (send CMD_STEP_FORWARD_SIMULATION as 4 bytes command, status 8 bytes, instead of enormous command/status packages.

Change some timeouts to use actual RTC time instead of dummy loops 1024*1024*1024.
Fix type conected -> connected

examples/SharedMemory/PhysicsClientUDP_C_API.cpp

@@ -20,7 +20,7 @@ b3PhysicsClientHandle b3ConnectPhysicsUDP(const char* hostName, int port)
 	}
 	else
 	{
-		printf("b3ConnectPhysicsUDP NOT connected.\n");
+		printf("b3ConnectPhysicsUDP connection failed.\n");
 
 	}
 	return (b3PhysicsClientHandle)direct;