Fix U2F if gitea is configured in subpath (#5302)

public/js/index.js

@@ -1530,7 +1530,7 @@ function initU2FAuth() {
     }
     u2fApi.ensureSupport()
         .then(function () {
-            $.getJSON('/user/u2f/challenge').success(function(req) {
+            $.getJSON(suburl + '/user/u2f/challenge').success(function(req) {
                 u2fApi.sign(req.appId, req.challenge, req.registeredKeys, 30)
                     .then(u2fSigned)
                     .catch(function (err) {
@@ -1543,12 +1543,12 @@ function initU2FAuth() {
             });
         }).catch(function () {
             // Fallback in case browser do not support U2F
-            window.location.href = "/user/two_factor"
+            window.location.href = suburl + "/user/two_factor"
         })
 }
 function u2fSigned(resp) {
     $.ajax({
-        url:'/user/u2f/sign',
+        url: suburl + '/user/u2f/sign',
         type: "POST",
         headers: {"X-Csrf-Token": csrf},
         data: JSON.stringify(resp),
@@ -1565,7 +1565,7 @@ function u2fRegistered(resp) {
         return;
     }
     $.ajax({
-        url:'/user/settings/security/u2f/register',
+        url: suburl + '/user/settings/security/u2f/register',
         type: "POST",
         headers: {"X-Csrf-Token": csrf},
         data: JSON.stringify(resp),
@@ -1623,7 +1623,7 @@ function initU2FRegister() {
 }
 
 function u2fRegisterRequest() {
-    $.post("/user/settings/security/u2f/request_register", {
+    $.post(suburl + "/user/settings/security/u2f/request_register", {
         "_csrf": csrf,
         "name": $('#nickname').val()
     }).success(function(req) {