Disable default worker production

coalgov-wiki-pages/npcs.txt

@@ -82,10 +82,12 @@ Admins can add starting goods or coal:
 ===== Configuration =====
 
 Worker roles are matched by NPC name under ''npc.worker.roles''. For example, an NPC named ''Farmer Joe'' uses the ''farmer'' role.
+Workers whose names do not match a configured role do nothing by default.
 
   npc:
     worker:
       tick_interval_seconds: 20
+      allow_default_production: false
       roles:
         farmer:
           behavior: FARM