[Mpi3-tools] Updated document

[John DelSignore]

Jeff Squyres wrote:
> Here's a copy of the updated document.  I made all my changes in red
> text; you should be able to flip through it quickly to see my
> changes.
> 
> At a minimum, could Martin and John D. reply that it's ok?

Looks good to me.

> I did *not* change any text about the IP address.  Reading the 3
> places where IP addresses are discussed, I'm comfortable leaving it
> unspecified as to whether the IP address is IPv4 or IPv6.  Do any
> existing tools allow MPIR_PROCDESC.host_name to be an IPv6 address?

TotalView supports IPv6, and MPIR_PROCDESC.host_name can be an IPv6 address or host name that maps to an IPv6 address.

Cheers, John D.