Merge the Isilon ATF code

This is a placeholder merge request to go over all of the items to ensure that I understand everything, some of the items from Isilon can be dropped as I dropped them from the atf branch (diff reduction), and make sure that any valid fixes from NetBSD can be pushed back.
Uh, hmmm... interesting why this isn't using a standard RPC header...

<pre># grep -r rpc_control /usr/include/
/usr/include/rpc/rpc_com.h:bool_t rpc_control(int,void *);
/usr/include/rpc/svc.h: * Operations for rpc_control().
</pre>