kernel #1 (kern_timeout.diff) + STOCK ng_base.c  [layer-2 still leaking]:
  baseline netgraph Count=6; after 30000 arm/cancel rounds: 5.76K/830K
kernel #1 + ng_base.c fix.diff (ng_free_item)    [full fix]:
  === FULL FIX v2 (kern + ng7 ng_free_item): pptp_leak 30000 ===
  done: 30000 rounds (windowing=1)
  exit=0
  netgraph       3     432       0    390M        5     <-- FLAT