Fix for Linux/AIX login hole

[karyn () cheetah llnl gov (Karyn Pichnarczyk)]

   > A less painful (for the system modification unaware) way to lock it up on
   > an AIX machine is:
   > 

   >    1. Enter SMIT (as root)
   >    2. Follow this path:
   >       Security & Users
   >       Users
   >       Change / Show Characteristics of a User
   >       User NAME (enter root)
   >    3. Change "User can RLOGIN" to false
   >    4. Click "Do"
   > 

Not sufficient.  Does not keep people from logging in as a user other
than root.

karyn