[imp] PGP and S/MIME

[Paul Reilly]

> Another possibility would be to let the user decide in his preferences if
> he wants to use PGP or S/MIME. If we could make the more flexible way you
> proposed work without cluttering the UI too much - great!
>
Is it possible for the admin to specify what class of users has what
options? For instance, I'd like to give PGP & S/MIME to staff but not
students initially. Can this be done by listing the options a user is
entitled to in a MySQL table ?

Paul