[xacml] List of mandatory date/duration functions

Attached is an updated copy of ConformanceTests.html, which
contains an updated list of mandatory functions.

Please review to see if this is correct.

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