refactor: code

lib/https/util.js

@@ -17,7 +17,7 @@ var sniPort;
 var SNICallback = function(serverName, cb) {
   serverName = ca.getDomain(serverName);
   var options = ca.createCertificate(serverName);
-  if (!options.ctx) {
+  if (!options._ctx) {
     options._ctx = ca.createSecureContext(options);
   }
   cb(null, options._ctx);