ietf-nntp LIST EXTENSION caching, latest wording

[Charles Lindsey]

In <Pine.LNX.4.55L-032.0310130929360.5901 at mail-ldap3.andrew.cmu.edu> Rob Siemborski <rjs3 at andrew.cmu.edu> writes:

>*If* the consensus is that we must include text about caching
>(which I think causes more problems than it solves), then something more like

>  others will appear and dissapear depending on state changes within
>the session.  An NNTP client MAY cache the results of this command, but
>MUST NOT rely on any cached results - from previous sessions or across
>session state changes that are documented to potentially invalidate
>the LIST EXTENSIONS response - remaining correct.

>would probably be better.

Much better, and I will even concede that is an appropriate use of MUST in
a Security Considerations section.

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