Using Lua scripts for `per_user` classifier not work on 2.2

[dacapoday]

Now at version 2.2. redis key isn't include per_user name, it only have RS_. But before 2.0, i can use my custom userid for per_user. my config is:

classifier "bayes" {
    tokenizer {
    name = "osb";
    }
    name = "base";
    backend = "redis";
    min_tokens = 11;
    min_learns = 200;
    autolearn = false;
    new_schema = true;

    per_user = <<EOD
return function(task)
    local rcpt = task:get_header('USER_ID')

    if (rcpt ~= nil and rcpt ~= '') then
        return rcpt
    end

    return nil
end
EOD

    statfile {
        symbol = "BAYES_HAM";
        spam = false;
    }
    statfile {
        symbol = "BAYES_SPAM";
        spam = true;
    }
    learn_condition = 'return require("lua_bayes_learn").can_learn';
}

feature require "Using Lua scripts for per_user classifier". Does this feature still work?