Using long for configure network timeouts

[Sasha Belyak]

Now in ignite configurations in many network related parameters (for
example: IgniteConfiguration.netTimeout, TcpDiscoverySpi.socketTimeout,
TcpDiscoverySpi.ackTimeout) used long. But network socket using int for
socket timeout, so we do simple "(int)timeout" type casting and if timeout
value > Integer.MAX_VALUE - get exception.
The question is: why we use long type?