NNFIX
[/?]
NNFIX repairs a standard format news spool, which it expects to find below its current directory.
NNFIX scans all messages in the news spool, and rebuilds all of the index
and high water mark files based upon the message contents, in particular
the contents of the XRef: headers in the messages, which must
have been properly set by whatever injected the message into the news spool.
NNFIX writes log information to its standard error.