Disallow connection from non-BTT transfers

[Zoriot]

Currently, smaller teams can be overwhelmed when random server transfers people to them.

Feature request:

• Disallow connections that come from no-BTT transfers.
• Make this behavior configurable per team/server.
• Optionally, display a message to the server indicating where a transferred user came from.

This will help reduce disruptions and give teams better control over incoming connections.

[cryophobia2122]

Hello, I will be Working on this Issue.