[Minor] Allow to restore the previous behaviour in asn module

src/plugins/lua/asn.lua

@@ -33,6 +33,7 @@ local options = {
   symbol = 'ASN',
   expire = 86400, -- 1 day by default
   key_prefix = 'rasn',
+  check_local = false,
 }
 
 local rspamd_re = rspamd_regexp.create_cached("[\\|\\s]")
@@ -78,7 +79,7 @@ local function asn_check(task)
   end
 
   local ip = task:get_from_ip()
-  if not (ip and ip:is_valid()) or ip:is_local() then return end
+  if not (ip and ip:is_valid()) or (not options.check_local and ip:is_local()) then return end
   asn_check_func[options['provider_type']](ip)
 end