Code review comment for lp:~michihenning/apparmor-easyprof-ubuntu/new-thumbnailer-methods

Putting this on hold for the moment. I didn't know that updating the security policy is such a big deal. So, rather than having one method per config param, I'll make it one method for several config params. That way, the change to the policy is needed only once, instead of each time we come with a new config param that we need to feed to the client-side lib.