Cleanup

core/src/mindustry/world/blocks/distribution/PayloadRouter.java

@@ -41,6 +41,8 @@ public class PayloadRouter extends PayloadConveyor{
                 do{
                     rotation = (rotation + 1) % 4;
                     onProximityUpdate();
+                    //this condition intentionally uses "accept from itself" conditions, because payload conveyors only accept during the start
+                    //"accept from self" conditions are for dropped payloads and are less restrictive
                 }while((blocked || next == null || !next.acceptPayload(next, item)) && ++rotations < 4);
             }
         }