am 78828ff4: nexus: Use interface for handling Supplicant events

Merge commit '78828ff4f5f959fcf8066ecb6a6b689d2a3c5985'

* commit '78828ff4f5f959fcf8066ecb6a6b689d2a3c5985':
  nexus: Use interface for handling Supplicant events
  nexus: Remove dependancy on libutil