joins do not log client source info

[radiumsoup]

When a user joins a channel, the hostname is not logged, making it impossible to see in the log (for example) if a user was authenticated and using a cloak. I'd like to be able to see where a user is coming from in the logs for a some small level of certainty that "this person was who I expected them to be". Difficult to determine after the fact from the current blank text field being logged.