Do not include private messages in the webserver logger module

[kamaln7]

Apparently d8d43d0b801ba704c1af75a32c3d8be08558c663 didn't fix it.

[reynir]

Is there a reason for using onRaw instead of onMessage? The callback is always checking wether it's a PRIVMSG anyway.

[kamaln7]

I mentioned that earlier and I believe clone1018 said we're probably going to implement logging other stuff too