C1 C4 - SetFriendOnlineState (by client)
Is sent when
A player wants to set himself on- or offline.
Causes the following actions on the server side
Depending on the state, the player is shown as offline or online in all friend lists of his friends.
|1||1||Byte||4||Packet header - length of the packet|
|2||1||Byte||0xC4||Packet header - packet type identifier|