change ischild to isparent so it is more accurate when daemonizing
change ischild to isparent so it is more accurate when daemonizing

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