Netsim Feature Request: Configurable timeout period

In the current version of netsim (approx version 0.2.11), netsim will shut down if no devices are connected in 15 seconds. There is also an option to disable this shutdown completely. Would it be possible to make this configurable? With my use case, I can't guarantee that a device will connect within 15 seconds.

An option to set it to an arbitrary value (such as 60 seconds or 120 seconds) would be very helpful.