Add setting to allow structures in seed world

Author: tastybento

src/main/java/world/bentobox/boxed/Settings.java

@@ -86,6 +86,10 @@ public class Settings implements WorldSettings {
     @ConfigComment("Other plugins may override this setting")
     @ConfigEntry(path = "world.difficulty")
     private Difficulty difficulty = Difficulty.NORMAL;
+    
+    @ConfigComment("Allow structures to generate in the seed world")
+    @ConfigEntry(path = "world.allow-structures")
+    private boolean allowStructures;
 
     @ConfigComment("Spawn limits. These override the limits set in bukkit.yml")
     @ConfigComment("If set to a negative number, the server defaults will be used")
@@ -1801,4 +1805,15 @@ public void setDisallowTeamMemberIslands(boolean disallowTeamMemberIslands) {
         this.disallowTeamMemberIslands = disallowTeamMemberIslands;
     }
 
+    public boolean isAllowStructures() {
+       return allowStructures;
+    }
+
+    /**
+     * @param allowStructures the allowStructures to set
+     */
+    public void setAllowStructures(boolean allowStructures) {
+        this.allowStructures = allowStructures;
+    }
+
 }

src/main/java/world/bentobox/boxed/generators/chunks/AbstractBoxedChunkGenerator.java

@@ -136,8 +136,7 @@ public boolean shouldGenerateMobs() {
 
     @Override
     public boolean shouldGenerateStructures() {
-        return false;
-        //return this.addon.getSettings().isAllowStructures();
+        return this.addon.getSettings().isAllowStructures();
     }
 
 }