[NNTP] Extension snapshots 3

[Clive D.W. Feather]

Ken Murchison said:
> Here are the latest versions of the extensions docs.

Using the official versions at the I-D repository.

General

Your various CAPABILITIES examples need to be audited against the
latest [NNTP], to ensure that, for example, they have the correct LIST
arguments based on the other capabilities.


AUTHINFO

2.1. First paragraph, change "is not advertised" to "MUST NOT be
advertised".


STREAMING

2.3.2: the last sentence contradicts the first. Since the first sentence
says it MUST support MODE STREAM if streaming works, the SHOULD in the last
sentence makes no sense. Just delete the last sentence.

3: you need syntax for simple-response-content:

    simple-response-content =/ streaming-response-content

    streaming-response-content = ("238" / "239" / "431" / "438" / "439")
        SP message-id

4. The relevant codes should have the line:
    1 argument: message-id
added; compare 111 or 222 in [NNTP].


STARTTLS

2.1. The sentence "However, ..." needs adjusting. Try:

    However, the capability MUST NOT be advertised once a TLS layer
    is active (see section 2.2.2.2), or after any alternative mechanism
    that installs a security layer (e.g. [NNTP-AUTH]).

Note the change to MUST NOT. The second bit is because, in principle,
STARTTLS after a USER authentication, or an SASL authentication that
does *not* set up a security layer, should be fine.

-- 
Clive D.W. Feather  | Work:  <clive at demon.net>   | Tel:    +44 20 8495 6138
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