[Oberon] Authentication for NNTP.

[peter at easthope.ca]

Aside from understanding how a stream is involved in base64 encoding, 
authentication works for Oberon Mail in A2.

Therefore I'm emboldened to work on authentication for NNTP.  With 
simple additions, the module reports this.

--- NNTP
host = reader443.eternal-september.org
user = PeterE
RCV: 200 news.eternal-september.org InterNetNews NNRP server INN 2.8.0 (20230418 snapshot) ready (posting ok)
SND: CAPABILITIES
RCV: 101 Capability list:
RCV: VERSION 2
RCV: IMPLEMENTATION INN 2.8.0 (20230418 snapshot)
RCV: AUTHINFO USER SASL
RCV: COMPRESS DEFLATE
RCV: HDR
RCV: LIST ACTIVE ACTIVE.TIMES COUNTS DISTRIB.PATS DISTRIBUTIONS HEADERS MODERATORS MOTD NEWSGROUPS OVERVIEW.FMT SUBSCRIPTIONS
RCV: OVER
RCV: POST
RCV: READER
RCV: SASL GSS-SPNEGO GSSAPI SCRAM-SHA-256 SCRAM-SHA-1 GS2-KRB5 GS2-IAKERB DIGEST-MD5 NTLM CRAM-MD5 PLAIN LOGIN
RCV: STARTTLS
RCV: XPAT
RCV: .
SND: AUTHINFO USER  PeterE
RCV: 381 Enter password
SND: AUTHINFO PASS  <password>
RCV: 481 Invalid credentials
RCV: 480 Authentication required for command
480 Authentication required for command

The user and password allow interactive login in the browser. Fairly 
sure they are correct.  Yet authentication fails. (?)

Why does the server show capability "AUTHINFO USER" and then refuse 
authentication?

SASL authentication is required?

Thanks,             ... P.L.


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