* osmo-ns-dummy: Add "mirror-mode" to mirror back any received packets
* ns2: Don't start sending NS-RESET until FR DLC is available
* ns2: Stop test procedure when going into unconfigured state
* ns2: Don't automatically re-start FSM at FORCE_UNCONFIGURED
* frame_relay: cosmetic: Unify log syntax when discarding Rx packets
* frame_relay: Discard received messages for DLC not yet active
* frame_relay: Add status call-backs for link + DLC status changes