Dropping NAS-Port AVP from Acct-Unique-Session-Id by default

[Nick Lowe]

>> Definitely an area where we could do with clarification in the spec. Hmm :(
>
>   The IETF operates at a speed which sometimes outruns glaciers.
>
>   I've been talking with a few people about just writing our own "best practice" documents and putting them on the FreeRADIUS web site.  If we can get multiple vendors to buy into the idea, we can create our own de facto standards.

That would be really awesome!