Use lua 5.2+ without needing compatibility flags.

profiles/lib/access.lua

@@ -1,13 +1,15 @@
 local ipairs = ipairs
 
-module "Access"
+local Access = {}
 
-function find_access_tag(source,access_tags_hierachy)
+function Access.find_access_tag(source,access_tags_hierachy)
     for i,v in ipairs(access_tags_hierachy) do
         local tag = source:get_value_by_key(v)
         if tag and tag ~= '' then
             return tag
         end
     end
-    return nil
+    return ""
 end
+
+return Access

profiles/lib/maxspeed.lua

@@ -1,8 +1,8 @@
 local math = math
 
-module "MaxSpeed"
+local MaxSpeed = {}
 
-function limit(way,max,maxf,maxb)
+function MaxSpeed.limit(way,max,maxf,maxb)
   if maxf and maxf>0 then
     way.forward_speed = math.min(way.forward_speed, maxf)
   elseif max and max>0 then
@@ -15,3 +15,5 @@ function limit(way,max,maxf,maxb)
     way.backward_speed = math.min(way.backward_speed, max)
   end
 end
+
+return MaxSpeed