test_hncp_net: Sending random seed to stderr so that it is shown regardless of debug level.
Some minor cleanup - added in_sync variable to track if we consider neighbor to be valid (if so, we can just use the last_heard instead of last_response, therefore reducing # of <= pings to half in stable state). Also optimized hncp_node_find_neigh_bidir to use index.
Reduced monkey test iteration # just to 1k - the test was taking too long.
Reversed the node order in net_sim - now they're listed in creation order (which makes parsing net_sim_is_converged somewhat easier).
in_sync handling change #n. Trickle resets seem helpful to detect collisions etc. even if not yet reachable / own id.
Removed spurious u from front of PRId64.