Default automatic Return Links to disabled and review compatibility

src/main/java/net/dnorberg/rivencraft/config/RivencraftConfig.java

@@ -75,7 +75,7 @@ public final class RivencraftConfig {
                         "Controls automatic Return Link creation for Descriptive Book travel.",
                         "ON_CREATION creates one link when an Age is first reached; ALWAYS creates one on every arrival; DISABLED creates none."
                 )
-                .defineEnum("return_link_mode", ReturnLinkMode.ON_CREATION);
+                .defineEnum("return_link_mode", ReturnLinkMode.DISABLED);
         builder.pop();
         builder.push("libraries");
         LIBRARY_LOOT_MODE = builder.comment(