ietf-nntp BCP for RFC977 server/RFC1036 interaction

[Brian Kantor]

The intention was that IHAVE would only be used by news neighbors, never
by clients.  The headers in an article arriving by IHAVE would not be
tampered with except to prefix the Path line.

An article arriving via POST was assumed to come only from a client, and
could lack some of the headers necessary for transport.

For those who remember the past, that means that 'IHAVE' was equivalent
to the 'rnews' program used to relay news, whereas POST was equivalent
to invoking 'inews' to submit a new article.
	- Brian