note on urlsafe base64

lib/encoding.js

@@ -98,5 +98,6 @@ Enc.urlBase64ToBase64 = function urlsafeBase64ToBase64(str) {
 Enc.base64ToBuf = function base64ToBuf(str) {
   // always convert from urlsafe base64, just in case
   //return Buffer.from(Enc.urlBase64ToBase64(str)).toString('base64');
+  // node handles urlBase64 automatically
   return Buffer.from(str, 'base64');
 };