Updated the config.php location

Updated the location of config.php file for including. 
Solution for error occured in Windows Environment

header.php

@@ -15,7 +15,7 @@
         <ul class="nav pull-right navbar-nav">
             <li class="dropdown" id="menuLogin">
                 <?php
-                    include(__DIR__.'/xvwa/config.php');
+                    include(__DIR__.'/config.php');
                     if(isset($_SESSION['user'])){
                         echo "<a href='#' class='dropdown-toggle' data-toggle='dropdown'> " . ucfirst(($_SESSION['user'])) . " <b class='caret'></b></a>";
                         echo "<ul class='dropdown-menu'>";