ietf-nntp BCP for RFC977 server/RFC1036 interaction

[Brian Kantor]

NNTP-Posting-Host is specifically to be set by the SERVER.  No client
should attempt to set it; whether you flag that as an error or simply
replace it depends on how you feel about people attempting to forge
news into your system.  (That's why I put it into NNTP in the first
place!)  Personally, I find rejecting the posting to be more satisfying.
	- Brian