Added the following query parameters to the URL that is sent to the
search web server. This will allow them to do version-specific content
if necessary (such as using secondlife:///app/region for viewer's that
support it).
* channel = the viewer channel name, e.g. "Second Life Beta Viewer"
* version = the full version string, e.g. "2.0.0.2001234"
* major = the viewer major version number, e.g., "2"
* minor = the viewer major version number, e.g., "0"
* patch = the viewer major version number, e.g., "0"
* build = the viewer major version number, e.g., "2001234"
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