[Rspamd] Remove DKIM forced action, move ratelimit lua, add meta exporter

data/conf/rspamd/lua/ratelimit.lua

@@ -0,0 +1,25 @@
+local custom_keywords = {
+  ['customrl'] = {},
+}
+
+function custom_keywords.customrl.get_value(task)
+  local rspamd_logger = require "rspamd_logger"
+  if task:has_symbol('DYN_RL') then
+    rspamd_logger.infox(rspamd_config, "task has a dynamic ratelimit symbol, processing...")
+    return "check"
+  else
+    rspamd_logger.infox(rspamd_config, "task has no dynamic ratelimit symbol, skipping...")
+    return
+  end
+end
+function custom_keywords.customrl.get_limit(task)
+  local rspamd_logger = require "rspamd_logger"
+  local dyn_rl_symbol = task:get_symbol("DYN_RL")
+  if dyn_rl_symbol then
+    local rl_value = dyn_rl_symbol[1].options[1]
+    rspamd_logger.infox(rspamd_config, "dynamic ratelimit symbol has option %s, returning...", rl_value)
+    return rl_value
+  end
+end
+-- returning custom keywords
+return custom_keywords