you have a good client using an IP listed on a RBL, this person cannot have a
chance to auth on qmail server if server uses rblsmtpd because connection is
dropped before call qmail-smtpd.
This patch fix this problem, changing rblsmtpd to doesn't drop the connection,
just set a var, that will be checked by patched qmail-smtpd, and if person is
authenticated, it ignores rbl check.
PR: ports/98390
Approved by: maintainer
f2934b4859