[logback-user] Something which should be made clearer in the logback doc: Should a layout be threadsafe?

Hi, Quick remark: It is not clear from the logback docs whether a new layout should be threadsafe. I strongly suspect that it should be (why would logback do the possibly unnecessary locking for you?), but - should that not be explicitly said? E.g. coders may fall into the usual trap of having an instance-bound or even static SimpleDateFormat member and not making the access to it synchronized etc (aehm). Best regards, --- David