- Move L2 addr configuration for the primary port to a taskqueue.  This fixes
  LOR of softc rmlock in iflladdr_event handlers.

- Call if_delmulti_ifma() after LACP_UNLOCK().  This fixes another LOR.

- Fix a panic in lacp_transit_expire().

- Fix a panic in lagg_input() upon shutting down a port.
Use printb() for boolean flags in ro_opts and actor_state for LACP.