SUJ and "mount" reporting

[Ivan Voras]

Shouldn't SU+J be visible in the output of "mount" somehow? I've just 
enabled it on a root file system of a machine and while tunefs and 
dumpfs report both soft-updates and SUJ are enabled (after reboot), the 
"mount" command only shows "soft-updates". Alternative question: how to 
verify is it active on a live file system?

(running CURRENT from a few hours ago, kernel&world synced)