Fixed typo

rules/headers_checks.lua

@@ -75,7 +75,7 @@ rspamd_config:register_symbol{
   parent = rcvd_cb_id,
   type = 'virtual',
   description = 'Two received',
-  group = 'header',
+  group = 'headers',
 }
 rspamd_config:register_symbol{
   name = 'RCVD_COUNT_THREE',

src/plugins/lua/ratelimit.lua

@@ -233,7 +233,7 @@ end
 
 local keywords = {
   ['ip'] = {
-    get_value = function(task)
+    ['get_value'] = function(task)
       local ip = task:get_ip()
       if ip and ip:is_valid() then return tostring(ip) end
       return nil