waterway=waterfall + natural=cliff resulting in biforcation

[adamfranco]

Thanks for this great tool! Reviewing the results I noticed a few cases that might be false positives.

The first is when waterway=waterfall + natural=cliff are used to map waterfall cliff edges as described in the Wiki:

Waterfall edge and cliffs
The cliffs forming the waterfall edge are drawn as a way and tagged as natural=cliff, drawing direction should be so that upstream is on the left side. node The cliff should share a node with the crossing waterway and this node should be tagged with waterway=waterfall as described above.

Example: Penobscot River waterfalls

Waterway Map: https://waterwaymap.org/ends/#map=18.07/45.613984/-68.704092
Way: https://www.openstreetmap.org/way/519218032