Merge pull request #446 from pi-hole/tweak/login-icon

Change padlock to key in login page

scripts/pi-hole/php/loginpage.php

@@ -25,7 +25,7 @@
       <form action="" id="loginform" method="post">
         <div class="form-group has-feedback <?php if ($wrongpassword) { ?>has-error<?php } ?> ">
           <input type="password" id="loginpw" name="pw" class="form-control" placeholder="Password" autofocus>
-          <span class="glyphicon glyphicon-lock form-control-feedback"></span>
+          <span class="fa fa-key form-control-feedback"></span>
         </div>
         <div class="row">
           <div class="col-xs-8">