MatScan offline mode vuln

[lx78WyY0J5]

Fix offline mode name overwrite
https://www.spigotmc.org/threads/herobrine-was-trying-to-join-on-my-minecraft-server.644639/

[lx78WyY0J5]

User also logged in with Altherneum user name but not with the right UUID leading to a normal user account with just the admin account name

[lx78WyY0J5]

Also joined survie without the right tag
logs :

[05:34:34] [Server thread/INFO]: /151.115.73.107:60804 lost connection: If you wish to use IP forwarding, please enable it in your BungeeCord config as well!
[05:34:34] [User Authenticator #3/INFO]: UUID of player Herobrine is f84c6a79-0a4e-45e0-879b-cd49ebd4c4e2
[05:34:34] [Server thread/INFO]: Herobrine[/45.159.229.139:60816] logged in with entity id 5779 at ([Spawn]-9.5, 83.0, 4.5)
[05:34:34] [Netty Epoll Server IO #0/WARN]: Failed to update secure chat state for Herobrine: 'Chat disabled due to missing profile public key. Please try reconnecting.'
[05:34:35] [Netty Epoll Server IO #0/WARN]: Failed to update secure chat state for Herobrine: 'Chat disabled due to missing profile public key. Please try reconnecting.'
[05:34:35] [Netty Epoll Server IO #0/WARN]: Failed to update secure chat state for Herobrine: 'Chat disabled due to missing profile public key. Please try reconnecting.'
[05:34:37] [Server thread/INFO]: Herobrine lost connection: Disconnected