[Rebuild] We're better off detecting splits and merges

[Richard Fairhurst]

FK270673 at fantasymail.de wrote:
> Currently, the database still contains a lot of hijacked ways (100%
> of  nodes are from A, but B is considered as creator).

Well, any way with 100% of nodes from a decliner will presumably be 
deleted, as the OSM database doesn't permit 0-length ways. ;)

That said, to help remapping efforts, it might be interesting to have a 
special visualisation of such ways.

cheers
Richard