We have "fetches" accessible from Lua, but I have not found a mechanism that allows me to access the value of log format variables.
Examples of useful variables: %b | backend_name %f | frontend_name %rt | request_counter Is there a way to access values like these from Lua, since they aren't (as far as I can tell) available as fetches? I realize not all variables would be available in every context, and I don't want to modify them, of course -- I only want to read them -- but I would like to be able to read them and use them in content generated in Lua. Are they accessible?
