[Rats] aligning the use case documents appropriately

[Michael Richardson <[e-mail]>]

"I am editing the usecase document prior to next Thursday's virtual interim"
This has taken longer than I would have liked, and Thursday is now tomorrow,
and you might want time to read it, so I have mostly failed here.
I am putting out a -02 document anyway.

I realized as I was processing the various comments that I and many others
are perhaps confused about what we need here.  I kept thinking that
this document was going to collect *end user* use cases, and of course some
people were wondering why I was talking about specific verticals.

Let me propose the following text:

+This document exists as place to collect use cases for the common RATS
+technologies in support of the IETF RATS charter point 1.  This document is
+not expected to be published as an RFC, but remain open as a working
+document.  It could become an appendix to provide motivation for a protocol
+standards document.
+
+This document will probably not deal with use cases from an end-user
+point of
+view, but rather on the technology verticals that wish to use RATS concepts
+(such as EAT) in their deployments.
+
+End-user use cases that would either directly leverage RATS technology, or
+would serve to inform technology choices are welcome, however.

I would be very happy if it turned out that we only discussed this point at
the virtual interim!   That we wind up with a strong consensus.

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