By Stephane Nitschke and Andreas Kranz COLOGNE, Germany (Reuters) -Hundreds of thousands of people faced train cancellations across Germany from Wednesday, as a three-day nationwide rail strike added to travel chaos in Europe’s largest economy, where farmers’ protests have blocked highways and snarled traffic. The strikes, called by the GDL train drivers’ union from Wednesday to Friday evening, have forced national rail operator Deutsche Bahn to run only stripped-back emergency timetables. One in five long-distance high-speed rail services were running and regional services have been “massivel…