added max_size on config, so it's likely to get noticed, since even 1M is probably too low for most sites. This should likely default to the same as databytes?
skip earlytalker checks for positive senders
limit negative karma senders to 1 concurrent connection (hosts_allow)
added karma::hook_pre_connection, to make hosts_allow change possible
added karma score to log entries
immunity check was disabled by default, as it wasn't a good policy. OTOH, a naughty check is a sensible default, as we can skip processing on messages we already decided to reject.
