Q:  Just exactly what are you supposed to enter for the hostname, username, and password when doing a WordPress plugin using the automatic upgrade feature?  It’s not my MySQL wordpress database and it’s not my blog’s username and password. WordPress offers no hint.

A:  It’s your web hosting account information.  More exactly, the information for logging into your FTP account.

Hostname = yourdomain.com
Username = your FTP username
Password = your FTP password