Support reverse proxies

Signed-off-by: droy <denis.roy@eclipse-foundation.org>
diff --git a/download.php b/download.php
index 7881a13..d4bfb03 100755
--- a/download.php
+++ b/download.php
@@ -126,8 +126,7 @@
     $_country_code = "xx";
   }
 
-  $remote_addr = $_SERVER['REMOTE_ADDR'];
-  //$remote_addr = '69.157.112.107'; #DEBUG
+  $remote_addr = $App->getClientRealIP();
   $ip_ccode = $Mirror->selectCountryCodeByIP($remote_addr);
   if($_debug == 1) {
     echo "Country given: " . $_country_code . " IP Geolocation: " . $ip_ccode . "<br />";