Army Sgt. 1st Class Tim Kennedy will fight in front of a decidedly friendly crowd tonight at Fort Campbell, Ky., in the main event of the third UFC “Fight for the Troops” card. Kennedy (16-4) will battle fellow 185-pounder Rafael “Sapo” Natal (17-4-1). That’s “Natal.” With a “T”: [youtube]http://www.youtube.com/watch?v=WOTscXtjK0k[/youtube] Honest mistake — after all, Kennedy’s been busy in the run-up to tonight’s fight, continuing his stellar history of media-darling-ness: After his initial opponent, Lyoto Machida, was moved off the card to replace the injured Michael Bisping in an earlier event, Kennedy Twitter-bombed nearly the entire UFC roster, seeking a replacement.…