fix source filenames missing domain

archivebox/main.py

@@ -550,7 +550,7 @@ def add(urls: Union[str, List[str]],
     if new_links and depth == 1:
         log_crawl_started(new_links)
         for new_link in new_links:
-            downloaded_file = save_file_as_source(new_link.url, filename='{ts}-crawl-{basename}.txt', out_dir=out_dir)
+            downloaded_file = save_file_as_source(new_link.url, filename=f'{new_link.timestamp}-crawl-{new_link.domain}.txt', out_dir=out_dir)
             new_links_depth += parse_links_from_source(downloaded_file)
 
     imported_links = new_links + new_links_depth