Expose BentoBox 1.16 portal generation mechanics. (#13)

BentoBoxWorld/BentoBox#1718

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

@@ -172,6 +172,12 @@ public class Settings implements WorldSettings {
     @ConfigEntry(path = "world.nether.spawn-radius")
     private int netherSpawnRadius = 32;
 
+    @ConfigComment("This option indicates if nether portals should be linked via dimensions.")
+    @ConfigComment("Option will simulate vanilla portal mechanics that links portals together")
+    @ConfigComment("or creates a new portal, if there is not a portal in that dimension.")
+    @ConfigEntry(path = "world.nether.create-and-link-portals", since = "1.16")
+    private boolean makeNetherPortals = false;
+
     // End
     @ConfigComment("End Nether - if this is false, the end world will not be made and access to")
     @ConfigComment("the end will not occur. Other plugins may still enable portal usage.")
@@ -1734,5 +1740,20 @@ public class Settings implements WorldSettings {
     public void setOnLeaveResetAdvancements(boolean onLeaveResetAdvancements) {
         this.onLeaveResetAdvancements = onLeaveResetAdvancements;
     }
-    
+
+    /**
+     * @return the makeNetherPortals
+     */
+    @Override
+    public boolean isMakeNetherPortals() {
+        return makeNetherPortals;
+    }
+
+    /**
+     * Sets make nether portals.
+     * @param makeNetherPortals the make nether portals
+     */
+    public void setMakeNetherPortals(boolean makeNetherPortals) {
+        this.makeNetherPortals = makeNetherPortals;
+    }
 }

src/main/resources/config.yml

@@ -87,6 +87,11 @@ world:
     # Minimum is 0 (not recommended), maximum is 100. Default is 25.
     # Only applies to vanilla nether
     spawn-radius: 32
+    # This option indicates if nether portals should be linked via dimensions.
+    # Option will simulate vanilla portal mechanics that links portals together or creates a new portal,
+    # if there is not a portal in other dimension.
+    # Added since 1.16
+    create-and-link-portals: false
   end:
     # End Nether - if this is false, the end world will not be made and access to
     # the end will not occur. Other plugins may still enable portal usage.