wrong param in help for pid file
wrong param in help for pid file

yonglehou/GearmanManager,hhy5861/GearmanManager,hechunwen/GearmanManager,productsupcom/GearmanManager,hechunwen/GearmanManager,lvbaosong/GearmanManager,productsupcom/GearmanManager,brianlmoon/GearmanManager,hhy5861/GearmanManager,yonglehou/GearmanManager