Enable trusted proxies in Symfony ^3.3 (#114)

Author: mathieudz

Diff for: Bootstraps/Symfony.php

@@ -80,6 +80,14 @@ public function getApplication()
             $app->booted = true;
         }, $app);
 
+        if ($trustedProxies = isset($_SERVER['TRUSTED_PROXIES']) ? $_SERVER['TRUSTED_PROXIES'] : false) {
+            Request::setTrustedProxies(explode(',', $trustedProxies), Request::HEADER_X_FORWARDED_ALL ^ Request::HEADER_X_FORWARDED_HOST);
+        }
+
+        if ($trustedHosts = isset($_SERVER['TRUSTED_HOSTS']) ? $_SERVER['TRUSTED_HOSTS'] : false) {
+            Request::setTrustedHosts(explode(',', $trustedHosts));
+        }
+
         return $app;
     }