docs: define direct-only dedicated hosting

config/server.cfg.example

@@ -4,6 +4,15 @@ bind_address="*"
 port=7777
 max_players=8
 public=false
+# Public discovery hides this server's address while players browse, but all
+# dedicated rooms are direct. Dedicated servers cannot use Woofmeow's shared
+# player-hosting relay. The game warns players before joining. Operators are
+# responsible for providing a publicly reachable route and should use off-site
+# hosting or a VPN with inbound UDP forwarding when exposing a home connection
+# is unacceptable.
+# Running this dedicated server at home does not hide the household IP by
+# itself. Residential-IP separation requires an off-site host or correctly
+# configured VPN.
 data_directory="/var/lib/straywild-server"
 
 [discovery]