SUJ testing update

[Jeff Roberson]

Hello folks,

I just committed some big changes to suj to svn at 
svn://svn.freebsd.org/base/projects/suj/head

You can now run softdep without journaling again.  The fast journal 
checker is enabled.  You need only use tunefs -j enable or tunefs -j 
disable.

The SUJ flag in the filesystem moved for backwards compat reasons.  If you 
have an earlier SUJ volume please disable it with the old tunefs and 
enable again with the new tunefs.

I'll be making a few more minor changes before I commit to HEAD but we're 
pretty close.  Please give it a go and make sure it works for you!

Thanks,
Jeff