404 handler incorrectly parses + symbol

https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/2496

Change-Id: I79f401a4004b56e0273acfafce48a1c8fd936831
Signed-off-by: Denis Roy <denis.roy@eclipse-foundation.org>

classes/downloads/downloadDirectory.class.php

diff --git a/classes/downloads/downloadDirectory.class.php b/classes/downloads/downloadDirectory.class.php
index ca78df6..25810ca 100644
--- a/classes/downloads/downloadDirectory.class.php
+++ b/classes/downloads/downloadDirectory.class.php
@@ -256,7 +256,7 @@
    * @return string
    */
   public function getCurrentDirectory() {
-    return $_SERVER['DOCUMENT_ROOT'] . urldecode($this->_getUri());
+    return $_SERVER['DOCUMENT_ROOT'] . rawurldecode($this->_getUri());
   }
 
   /**