Code review comment for lp:~paolo-de-rosa/charms/trusty/percona-cluster/innodb_flush_log

Paolo, I have a nit with the config description and would like to see that flushed out a bit more. There's a lot more information on the setting itself upstream which isn't included here. I don't think we should include it here specifically but instead should possibly reference the upstream documentation in addition to a basic discussion.