daemon/lua: add kluautil.lua file for helpers functions

daemon/lua/kluautil.lua

+
+-- Get length of table
+function kr_table_len (t)
+	local len = 0
+	for _ in pairs(t) do
+		len = len + 1
+	end
+	return len
+end
+

daemon/lua/meson.build

@@ -34,6 +34,7 @@ lua_src = [
   sandbox,
   trust_anchors,
   files('zonefile.lua'),
+  files('kluautil.lua'),
 ]
 
 # install daemon lua sources

daemon/lua/sandbox.lua.in

@@ -32,6 +32,8 @@ if rawget(kres, 'str2dname') ~= nil then
 	todname = kres.str2dname
 end
 
+-- Binding lua helper
+kluautil = require('kluautil')
 
 worker.resolve_pkt = function (pkt, options, finish, init)
 	options = kres.mk_qflags(options)