VlanDevice gains devices: Rc<RefCell<DeviceList>> field. send()
now forwards tagged frames to parent device via the shared list,
instead of dropping them (R43 drop fix) or self-looping (original).
Constructor changed: VlanDevice::new(name, parent, vlan_id, devices).
netfilter/netcfg/route: direct routes + flush + version + help
docs: NETWORKING-IMPROVEMENT-PLAN.md updated with Phase 4
completion status (firewall/conntrack/NAT) and Phase 6 VLAN status.
All 31 tests pass.
Red Bear OS
b5d1ba1bca