Also have stem process execv() with original command-line arguments so
that they're re-parsed and inherited correctly by supervised-nodes in
the event the stem process needs to be re-created.
More aspects of the cluster configuration to get fleshed out later,
but a basic cluster like one would use for a live deployment
can now be instantiated and run under supervision. The new
clusterized-pcap-processing supervisor mode is also not done yet.
