Comment 0 for bug 509742

A user should not be able to turn on the "Limit Bandwidth Usage" and set either the download (read_limit) or upload (write_limit) to 0 (zero) as this will prevent the Ubuntu One client and syncdaemon from working properly. We need to determine the minimum bandwidth needed to allow the client to work properly (taking into account the needs for the storage protocol, messaging, etc. to take place) and only allow the settings to go this low.