Implement version flap detection, #355.
Implement version flap detection, #355.

dra/the-idb,dra/the-idb,fkr/the-idb,idb-project/the-idb,rbns/the-idb,idb-project/the-idb,fkr/the-idb,fkr/the-idb,fkr/the-idb,rbns/the-idb,rbns/the-idb,idb-project/the-idb,rbns/the-idb,dra/the-idb,idb-project/the-idb,dra/the-idb