Add reindent script and readme

This is for the great reformatting.  The reindenture script will
reindent everything under a given directory.

Jim Lieb also wants us to follow kernel practice and clean things up as
per checkpatch, so there are directions for how to invoke it in the
README.

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Update ntirpc submodule.

Take FreeBSD/portability fixes from Sachin Bhamare.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>