update for this JOSM validator address test, that checks for duplicates in addresses that use addr:street/addr:place https://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/data/validation/tests/Addresses.java
JOSM Ticket: https://josm.openstreetmap.de/ticket/16310
german discussion regarding this topic: https://forum.openstreetmap.org/viewtopic.php?pid=699386#p699386