NAME
       UMSRLogin -- Open a certain UMS MB for a certain user.

   SYNOPSIS
       login = UMSRLogin( server, user, passwd )
         D0                 D2     D3     D4

       LONG UMSRLogin( STRPTR, STRPTR, STRPTR );

   FUNCTION
         Like   UMSLogin(),  but  specifies  a  special  MB.  This permits
       having multiple MBPs running on the same machine.  It will also be
       used for specifying a MBP on a local network.

   INPUTS
       server - Name of the MB.
       user   - Name or 'alias' of an user know to the MBP.
       passwd - The user's correct password. A pointer to the null-string
                is allowed, NULL itself isn't.

   RESULT
       login  - Internally used handle to track and remember resources
                associated  with  each  Login.   Different  for a single
                user's  multiple  Logins.  One Login may be used only by
                one process at a time.
                Greater 0 on success, lower or equal 0 on failure.

   EXAMPLE
       long login = UMSRLogin( "test-server", "Martin Horneffer", "secret");

   NOTES
         UMSRLogin(  "",  x, y) and UMSRLogin( NULL, x, y) both are equal
       to UMSLogin( x, y).

   SEE ALSO
        UMSLogin(),  UMSLogout()