Copy 'relaxed api url' functionality over to webui

public/scripts/textgen-settings.js

@@ -6,6 +6,10 @@ import {
     setGenerationParamsFromPreset,
 } from "../script.js";
 
+import {
+    power_user,
+} from "./power-user.js";
+
 export {
     textgenerationwebui_settings,
     loadTextGenSettings,
@@ -98,9 +102,10 @@ function selectPreset(name) {
 function formatTextGenURL(value) {
     try {
         const url = new URL(value);
-        if (url.pathname.endsWith('/api')) {
-            return url.toString();
+        if (!power_user.relaxed_api_urls) {
+            url.pathname = '/api';
         }
+        return url.toString();
     } catch { } // Try and Catch both fall through to the same return.
     return null;
 }