[Spambayes] Does spambayes train on its own headers?

[Drew Raines]

Since my corpus is relatively small (on the order of hundreds for
spam and many hundreds for ham), I get false negatives fairly
frequently.

This doesn't bother me; I just move them to my spam folder where my
hammie cron trains on them daily.  These old spams, though, have
X-Spambayes-Classification and X-Hammie-Debug headers which could
skew statistics in .hammiedb.  

Do I need to add those to safe_headers in $BAYESCUSTOMIZE, or does
hammiefilter know not to look at hammie_header_name and
hammie_debug_header_name when training?

-Drew