Hi,

I've recently made tools/nfs-iostat/nfs-iostat.py more useful in our 
autofs environment with a variety of cleanups and am offering this patch 
up for discussion and/or inclusion in nfs-utils.  It does the following:

* Adds a --top flag to sort the display of mountpoint entries by ops/s.
* Adds a --<n> flag to only display stats for the first <n> mountpoints
* Re-reads the mountpoint list on intervals since it's dynamic in an
   autofs environment.
* Conforms the Python path to the LSB 3.2+ standard of /usr/bin/python
http://refspecs.freestandards.org/LSB_3.2.0/LSB-Languages/LSB-Languages/pylocation.html

My ml subscription is still pending, so make sure this email is cc'ed on 
feedback.  Thank you.

-- Lans Carstensen