Description

   All logins call this routine after the password is authenticated
   to allow the site to check other access restrictions. The site
   may check its own access restrictions and any of the following
   OpenVMS access restrictions:

   Access
   Restriction        Callback Routine Used to Check Restriction

   Account            LGI$ICB_ACCTEXPIRED
   expiration
   Password           LGI$ICB_PWDEXPIRED
   expiration
   Account disabled   LGI$ICB_DISUSER
   Access modes and   LGI$ICB_MODALHOURS
   times