Freeze chat doesn't block join, leave, or welcome messages

[Parsonswy]

Describe the bug /freezechat doesn't block join, leave, or welcome messages from being sent in chat. We had someone spam joining / leaving our server with a botnet of ~180 accounts and having the chat frozen didn't stop the onslaught of welcome, join, and leave messages.

Full startup log of affected servers N/A

To Reproduce Steps to reproduce the behavior:

1. Have MultiChat join, leave, or welcome messages enabled
2. /freezechat
3. Join / leave the server

Expected behavior Only people with freezechat permissions are able to send messages in chat and that that either extends to their join / leave messages, or all join / leave messages are blocked until chat is thawed.

Screenshots N/A

Platform and Versions (please complete the following information):

• MultiChat Version: 1.7.4

Additional context I'm not sure if this was implemented this way intentionally, but the only way to block the join / leave messages now is for someone with FTP access to manually them in the MultiChat config and /multichat reload. That takes time and is not something lower level or non-technical staff can do. I can see instances where some people may still want to see join / leave messages, even while chat is frozen, so maybe something like /freezechat all | messages | notifications could work, though that would require a bit more work to implement.