Merget getIP.php with master

Test backends/getIP.php

@@ -15,6 +15,7 @@ if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
     $ip = $_SERVER['X-Real-IP'];
 } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
     $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
+	$ip = preg_replace("/,.*/", "", $ip); # hosts are comma-separated, client is first
 } else {
     $ip = $_SERVER['REMOTE_ADDR'];
 }