Add note to relay docs about internal interface instability
@@ -3,6 +3,8 @@ The relay package contains host implementations that automatically
advertise relay addresses when the presence of NAT is detected. This
feature is dubbed `autorelay`.
+Warning: the internal interfaces are unstable.
+
System Components:
- AutoNATService instances -- see https://github.com/libp2p/go-libp2p-autonat-svc
- One or more relays, instances of `RelayHost`
