key to detect ip in Jelastic Environments

If you use Jelastic Cloud Environments you have another key to get client ip. I put this one in array to works

Author: KelvynCarbone

src/GeoIP.php

@@ -232,6 +232,7 @@ public function getClientIP()
         $remotes_keys = [
             'HTTP_X_FORWARDED_FOR',
             'HTTP_CLIENT_IP',
+            'HTTP_X_REAL_IP',
             'HTTP_X_FORWARDED',
             'HTTP_FORWARDED_FOR',
             'HTTP_FORWARDED',