fix typo

Author: gkorland

lib/individualCommands.js

@@ -181,7 +181,7 @@ Multi.prototype.info = Multi.prototype.INFO = function info (section, callback)
 };
 
 function auth_callback (self, pass, user, callback) {
-    // Backward compatibility support for auth with password on
+    // Backward compatibility support for auth with password only
     if (user instanceof Function){
 		callback = user;
 		user = null;