[Exim] remote_max_parallel logic

I assumed that for a long recipient list involving multiple target
hosts (comming from dozens of RCPT TO commands in the SMTP dialog) are
split and distributed across multiple delivery processes. However,
that doesn't seem to be the case, there are only extremely few
delivery processes. Or are MX lookups needed during the split and
stalling delivery?

--
Florian Weimer                       Weimer@???
University of Stuttgart           http://CERT.Uni-Stuttgart.DE/people/fw/
RUS-CERT                          +49-711-685-5973/fax +49-711-685-5898