Track whether we've ever seen a device in-sync.
Track whether we've ever seen a device in-sync.

TrimBiggs/calico,neiljerram/felix,neiljerram/felix,matthewdupre/felix,TrimBiggs/calico,Metaswitch/calico,neiljerram/felix,alexhersh/calico,alexhersh/calico,neiljerram/felix,matthewdupre/felix,Metaswitch/calico