By EDGAR H. CLEMENTE, Associated Press TAPACHULA, Mexico (AP) — Caribe Dorvil wakes up at 3 a.m. each day to prepare food to sell in a small street market with dozens of other Haitian migrants in this southern Mexican city. Unable to find other work because they still lack legal status, Dorvil and Haitian migrants sell meals, soft drinks, clothing and offer services such as haircuts, manicures and