At the moment, the NLM cookie length is fixed to 8 bytes, while 1024 is the
theoretical maximum.  FreeBSD uses 16 bytes, Mac OS X uses 20 bytes. 
Therefore we need to make the length dynamic (which I set to 32 bytes).

This patch is based on an old patch for Linux 2.4.23-pre9, which I changed
to patch properly (also added some stylish NIPQUAD fixes).

From: Neil Brown <neilb@cse.unsw.edu.au>

Further lockd tidyups.
  - NIPQUAD everywhere that is appropriate
  - use XDR_QUADLEN in more places as appropriate
  - discard QUADLEN which is a lockd-specific version of XDR_QUADLEN
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>