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chuser.pl
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This is a cgi-bin program written in perl used to change user
password and .forward file for e-mail forwarding.

The HTML form (form_us.html) ask for username and password, then
it calls the first perl script (chuser_form.pl) which generates
a second form. In this form the contents of .forward is displayed
and the user can change it and the password.

When the second form is submitted, the second perl script
(chuser.pl) is called and it performs the changes.

Username and password is asked only in the first form, but the
second form (dinamycally generated) has two hidden field already
filled with the username and the crypted password. So the second
perl script receive all the information required to make the
changes.

Each perl script is called via a suid wrapper.
