May be a bug in mod_session based (cookie), two times Set-Cookie in response headers!

[zhiguo zhao]

Hi all,

   I found when I enable mod_session with cookie, everytime response have
tow times Set-Cookie.
  I found function session_cookie_save react to both headers_out and
err_headers_out, then when send header call function
ap_http_header_filter, apr_table_overlay  headers_out and err_headers_out,

 I think this may be a bugs. Please notice that.