When South African playwright Athol Fugard’s ” ‘Master Harold’… and the Boys” appeared in 1982, it was heralded as a passionate statement about friendship, humility and apartheid. In the intelligent production of “Master Harold” at Quotidian Theatre, it remains an extremely timely masterpiece about respect and self-knowledge. At Quotidian, two very talented actors play “the boys,” or servants. Sam (Jason B. McIntosh) is the older, wiser of two middle-aged black waiters at St. George’s Park Tea Room in Port Elizabeth, South Africa. Willie (Theodore M. Snead) is younger and less well-educated.