[xacml] Change Request: allow more than two arguments to "add"

Change Request:

  Allow function:integer-add and function:decimal-add to take
  more than two arguments.

  Rationale:

  This saves having to write nested statements for these simple
  operations.

Anne
-- 
Anne H. Anderson             Email: 
Sun Microsystems Laboratories
1 Network Drive,UBUR02-311     Tel: 781/442-0928
Burlington, MA 01803-0902 USA  Fax: 781/442-1692