[xacml] AA28: typo: change "adverary" to "adversary"

Text location: 9.2.3.1 "Communication confidentiality", first
paragraph, 4th line, p. 78, line 3140

Text change: change "for an adverary to know" to "for an
adversary to know"

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