Also use `FILE.date` instead of `FILE.change_date` (`change_date` is the date of the last status change, quite often same as creation date, while `date` is the last modification date).
- WSF_REQUEST.is_keep_alive_http_connection: BOOLEAN - HTTP_HEADER_MODIFIER.put_connection_keep_alive - HTTP_HEADER_MODIFIER.put_connection_close In Standalone request handler code, better detection of Connection: keep-alive header.
