nfsd will not have a file descriptor, nor an owner on the filp.  nfsd also
will not use signals.  Seperate the lease processsing coe from
fcntl_setlease() into a __setlease() call.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>