docs: private void add_to_freelist(long addr, int size)
      {
          int list_index;
  
          if (size <= last_quick_size_block) {
              list_index = calculate_list_index_for_dealloc(size);
          } else {
              list_index = last_ql_index;
          }
          add_new_block_to_freelist(addr, size, list_index);
      }