With Brett Favre about to be added to the fold, the Vikings knew they had to get rid of one of their excess quarterbacks.  Well, on Thursday the hammer fell…on Sean Glennon, a non-draftee the Vikes signed as a free agent. All kidding aside:  clearly, when Favre signs, somebody is going to have to go.  The obvious choice for axing would be John David Booty; not only is he already superfluous anyway, but getting rid of him would save Brett the unpleasant task of having to knuckle-punch hi...