[xacml] AA18: editorial: change "implementors" to "implementers"

Text locations:
1) Section 10. Conformance, 10.1 Introduction, item "1.", p. 78,
   line 3221
2) Section 10. Conformance, 10.2 Attestation, p. 78, first
   sentence.
3) Appendix F. Notices, first paragraph, last sentence, p. 121,
   line 4706

Text change: replace "implementor" with "implementer".

Rationale: Star Office spell check says this is the way to spell
it.

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