 - Add a mutex to the ufsmount structure.  This mutex is used to protect    any per-instance global data that is not already protected by a    buf or vnode lock.  Presently, only fields in ffs's struct fs utilize    this lock.  - Sort some ufsmount members so that fields used for quotas are grouped    together.  This is in anticipation of quota locking.
 - Add a mutex to the ufsmount structure.  This mutex is used to protect
   any per-instance global data that is not already protected by a
   buf or vnode lock.  Presently, only fields in ffs's struct fs utilize
   this lock.
 - Sort some ufsmount members so that fields used for quotas are grouped
   together.  This is in anticipation of quota locking.

Sponsored By:	Isilon Systems, Inc.

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