list function for `mx

gistfile1.js

{
   "_id": "_design/configs",
   "_rev": "4-a0b96a31984e1267e6ecf46302744451",
   "views": {
       "subnet": {
           "map": "function(doc) {\n  emit(null, doc);\n};"
       }
   },
   "lists": {
       "conf_fmt": "function(head, req) {\n  var row;\n  start({\n    \"headers\": {\n      \"Content-Type\": \"text/plain\"\n     }\n  });\n\n  while(row = getRow()) {\n    send(\"subnet \" + row.value.network + \" netmask \" + row.value.netmask + \"{ option routers \" + row.value.gateway + \"; }\\n\" );\n  }\n}"
   }
}