fixed an error in sanitize path

app/Http/Controllers/ProxyController.php

@@ -514,8 +514,8 @@ class ProxyController extends Controller
         $sanitizedPath = null;
         if(!empty($parts["path"])){
             $pathParts = explode("/", $parts["path"]);
-            foreach($pathParts as $pathPart){
-                if(empty($pathPart)) continue;
+            foreach($pathParts as $index => $pathPart){
+                if($index === 0) continue;
                 // The Path part might already be urlencoded
                 $sanitizedPath .= "/" . rawurlencode(rawurldecode($pathPart));
             }