* Make spammy_tlds configurable
The hardcoded list of spammy tlds can't fit every needs. Makes this configurable through a config file.
You can now also raise the karma for tlds you want.
The default config provided keep the same behaviour as before.
* Update tlds' karma
The default behaviour (connection needs to have at least 3 or -3 to be considered
nice or naughty) is not always what we want, depending on the number of plugins
which adjust the karma. Lets make it configurable
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
