ioninja-hwc: fragment captures

Hello!
Again I am capturing in a remote location, without good communications, using a simple raspberry and a Serial Tap. It is permanently capturing as we are trying to catch a "sporadic" issue.
As communications are bad, we are "chunking" the logs, in order to be able to download just the piece of log in which the issue eventually occurs. Now, we are chunking it "restarting" the ioninja-hwc process every 2 hours. It is easy using the systemd capabilities (using RuntimeMaxSec), but a side efect is that we have to set a minimun restart timeout (2 min), in order to avoid that the unit goes permantly disabled if a error happens (mainly, during installation, the raspberry is powered up before the serial tap is connected...).

Well, my point is, perhaps you could consider to add an option in the "ioninja-hwc" in order to allow "fragment" the logs (some similar, or simpler, to the opcions "-C" / "-G" available in tcpdump).

Regards!