[security-services] Proposed text for replacing ConfirmationMethod byAuthenticationM ethod in AuthenticationQuery

["Mishra, Prateek" <pmishra@netegrity.com>]

replace lines 1282-1290 with:

<AuthenticationMethod> [Optional] 
A filter for possible responses. If it is present, the query made is "What
assertions containing authentication statements do you have for this subject
with the supplied authentication method?" 


In response to an authentication query, a responder returns assertions with
authentication statements as follows: first, rules given in 3.4.4 for
matching against the <Subject> element of the query identify the assertions
that may be returned. Further, if the <AuthenticationMethod> element is
present in the query, at least one <AuthenticationMethod> element in the set
of returned assertions MUST match. It is OPTIONAL for the complete set of
all such matching assertions to be returned in the response.

line 1298 is changed to:

<element ref="saml:AuthenticationMethod" minOccurs="0"/>