[fdo] Captcha added for subscription

[Tollef Fog Heen]

]] James Cloos 

> The site shouldn't rely on ecmascript and nothing should farm out to
> goog or the like.

Feel free to provide an alternate implementation of captchas for
mailman.

You can also subscribe without captchas using the email interface if
you like that better.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are