A gunman shot a pimp to death and fired at two prostitutes – injuring one – as they sat in an idling green minivan early this morning in Brooklyn. The weapon-wielding thug walked up to the window of the 2000 Dodge Caravan and aimed at the 44-year-old hustler behind the wheel at 2:11 a.m. in Brownsville – fatally hitting him in the lower back, police said. Bullets shattered the windshield and pierced a 30-year-old prostitute in the right arm, torso and right leg as she sat in the passenger seat, police said. After the attack, another lady of the night...