hub_cycle: uid=0 argv0=./hub_cycle (DF-3559 ng7 hub cycle)
STEP sockets ready
STEP cycle built: HL{l1,a,b}<->{x,y}HE, entry C.e, NO node-local config was needed
STEP injecting 1 byte ...
STEP sendto ok
DRAIN total=159022 packets in 15.1s (10506.2 pkt/s)
DRAIN total_after_pause=159022 (delta=0)
RESULT no-panic survived 40s (see DRAIN counters for circulation state)
HUBRC=0
--- stock kernel, ng7 netgraph.ko+ng_socket.ko+ng_hub.ko loaded, storm mode
--- (entry hook created first -> hub's NG_FWD drains to socket; the cycle
---  keeps running via ASYNC m_dup successors; one byte -> 159,022 packets
---  in 15s; self-terminates after the drainer stops; no panic)