[wsrp-wsia] [change request #238] No userAgent info => ??

Document: Spec
Section: 6.1.7
Page/Line: 31/7
Requested by: Rich Thompson
Old text: [append new text]
New text: If the Consumer does not have access to the userAgent 
information, it should supply a value of "".
Reasoning: It was pointed out that the Consumer will not always have 
access to the userAgent info.