My two cents: I agree that another "name mangled" abbreviation is not particularly helpful, but I also agree with Jim's concern: "apr_token" made me immediately wonder what made this exclusive to HTTP tokens. Unfortunately I don't have much of an alternative suggestion. I have seen other frameworks refer to an "invariant" or "independent" locale/culture before; maybe that helps jog someone's creativity?
Feel free to ignore my rambling. ;) My default naming strategy is to throw out random ideas. --Jacob (on mobile, apologies for strange formatting)