Delete dead symlinks

secondary.py

@@ -133,7 +133,7 @@ class Backup:
     def delete(self, dst):
         self.log.DEBUG('Delete:', dst.name)
         dst_path = os.path.join(self.dst_root, dst.name)
-        if os.path.exists(dst_path):
+        if os.path.lexists(dst_path):
             trash_path = os.path.join(self.trash, dst.name)
             trash_dir = os.path.dirname(trash_path)
             if not os.path.exists(trash_dir):