Use modules preload for lua.
Use rspamd_ prefix.
Add rspamd_ prefix to regexp module.
Adopt emails plugin.
Adopt ip_score plugin.
Modernize maillist plugin.
Adopt multimap plugin.
Adopt once_received plugin.
Adopt phishing plugin.
Adopt ratelimit filter.
Adopt rbl plugin.
Adopt trie plugin.
Adopt whitelist plugin.
Adopt settings.
Adopt config.