sudo feature: send a message to user to whomone do sudo su - use rname

[Heikki Korpela]

> On Mon, 13 Aug 2001, Maubert, Pierre wrote:
> > users requested me to receive a message each time one issues the command
> > sudo su - $USER.

On Mon, 13 Aug 2001, I blabbered:
> 	- either write a 'su' wrapper that handles this and disallow
> 	  'su' itself.

> 	- write a sendmail wrapper that checks if people should be
> 	  mailed and use 'mailpath', 'mailto' and 'mail_always' in
> 	  sudoers(5).

I forgot one:

	- use one of the many logfile surfers out there and have
	  it watch the sudo logfile for 'su'