1) Don't forward link.SERVER_LINKED since we already generate
link.SERVER_LINKED_REMOTE ourselves.
2) Fix using wrong server name(s) in link.SERVER_LINKED_REMOTE
reported by flo in https://bugs.unrealircd.org/view.php?id=5988
3) Don't show link.SERVER_LINKED_REMOTE messages when we
are syncing to a network, otherwise you would get eg 50 of
such messages for 50 servers when you link in 1 server.
No longer log to all ircops if no matching snomasks.
So yeah, if you don't load snomask.default.conf you will see nothing
(TODO: some warning / error for this)