Add description for options in custom configuration
Add description for options in custom configuration

danielqsj/ingress,arjanschaaf/ingress,nicksardo/ingress,canhnt/ingress,jcmoraisjr/ingress,literalice/ingress,kubernetes/ingress-nginx,caicloud/ingress,canhnt/ingress,matthewg/ingress,porridge/ingress,coryfklein/ingress,caicloud/ingress,nicksardo/ingress,chentao1596/ingress,danielqsj/ingress,canhnt/ingress,nicksardo/ingress,jcmoraisjr/ingress,nevetS/ingress,caicloud/ingress,winfield-chen-hs/ingress,kubernetes/ingress-nginx,canhnt/ingress,aledbf/ingress-nginx,winfield-chen-hs/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,aledbf/ingress-nginx,caiyixiang/ingress,porridge/ingress,caicloud/ingress,kubernetes/ingress-nginx,kubernetes/ingress-gce,caiyixiang/ingress,nicksardo/ingress,matthewg/ingress,kubernetes/ingress-gce,nevetS/ingress,kubernetes/ingress-nginx,coryfklein/ingress,aledbf/ingress-nginx,arjanschaaf/ingress,chentao1596/ingress,jcmoraisjr/ingress,literalice/ingress