Use `tunnel=culvert` on waterways when using the "add a tunnel" crossing ways fix (re: #6617)
Use `tunnel=culvert` on waterways when using the "add a tunnel" crossing ways fix (re: #6617)

openstreetmap/iD,openstreetmap/iD,morray/iD,kartta-labs/iD,kartta-labs/iD,kartta-labs/iD,morray/iD,openstreetmap/iD