In the Caribbean, they signal boredom in the loudest manner possible. Between overs the music goes deafeningly silent, and fielders cross over to the other side without the rhythmic intimations of a competition between DJs in the opposite ends of the stadium. It’s deathly quiet today at the Antigua Recreation Ground. Straggly groups of spectators are assembled in the West Indies Oil Stand — ‘‘the best place to watch cricket in Antigua,’’ according to a connoisseur — in the more elitist Andy Roberts Stand, in the Rude Boy Stand with the sun shining straight down. ON THE BORDER OF BOREDOM