Patch to support nginx reverse proxy

Hi, team. I run WordPress behind an nginx reverse proxy and login-lockdown blocks the proxy’s IP. I’d suggest this patch. Can it be incorporated?

Thanks!

--- wp-content/plugins/login-lockdown/libs/utility.php.orig
+++ wp-content/plugins/login-lockdown/libs/utility.php
@@ -129,7 +129,9 @@
   {
     $ip = '';

-    if (!empty($_SERVER['REMOTE_ADDR'])) {
+    if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && !empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
+    } elseif (!empty($_SERVER['REMOTE_ADDR'])) {
       $ip = $_SERVER['REMOTE_ADDR'];
     }