RABAT, March 19 : Moroccan fans have welcomed their team's controversial coronation as Africa Cup of Nations champions, though some urged caution as Senegal prepare to challenge the ruling that has sent shockwaves through African football. The Confederation of African Football (CAF) declared Morocco champions on Tuesday after ruling Senegal forfeited the January 18 final in Rabat by walking off the pitch for 14 minutes in protest at a potentially decisive penalty awarded against them.  Although