Add ability to specify checkServerIdentity callback

Author: tobio

lib/connection.js

@@ -94,6 +94,7 @@ Connection.prototype.connect = function (port, host) {
     self.stream = tls.connect({
       socket: self.stream,
       servername: host,
+      checkServerIdentity: self.ssl.checkServerIdentity,
       rejectUnauthorized: self.ssl.rejectUnauthorized,
       ca: self.ssl.ca,
       pfx: self.ssl.pfx,