get_station: Do not ignore "Betriebsstelle unbekannt" for now

		if ( $station_node->getAttribute('ds100') =~ m{ ^ D \d+ $ }x ) {

			# This is an invalid DS100 code, at least from DB perspective.

			# So far it seems to refer to subway stations which do not have

			# IRIS departures.

			next;

			# This used to indicate an invalid DS100 code, at least from DB

			# perspective. It typically referred to subway stations which do not

			# have IRIS departures.

			# However, since Fahrplanwechsel 2022 / 2023, this does not seem

			# to be the case anymore. There are some stations whose DS100 code

			# IRIS does not know, for whatever reason. So for now, accept these

			# stations as well.

			#next;

		}

		push(