There should be more error checking for various things, in particular 
sanity checking of the form variables passed in.

Could check username/password submitted against horde's copy of the password
to make sure they match and if not reject it earlier.  Instead we are 
currently waiting until the ftp connection fails to see if the password 
is wrong.  This isn't very precise as the ftp connection could have 
failed for other reasons.

Add method to view current settings.

It only is meant to work with one address to forward to, and may have 
problems if you enter more than one address.  May need to address this in
both the form input (max length) and the forwards.php file (check for
problems?)

Add passive support via config item and ftp_pasv($connection, 1) command?

