Updated bit of TURN documentation.

matrix/coturn/README.md

@@ -11,6 +11,10 @@ to use TURN over IPv6, we'll stick to a strict IPv4-only configuration.
 
 Also, because VoIP traffic is only UDP, we won't do TCP.
 
+IMPORTANT! TURN can also be offered by [LiveKit](../element-call#livekit), in
+which case you should not run coturn (unless you don't use LiveKit's built-in
+TURN server).
+
 
 # Installation
 
@@ -148,7 +152,11 @@ each certificate renewal:
 cd /etc/coturn/ssl
 cp /etc/letsencrypt/live/turn.matrixdev.example.com/{fullchain,privkey}.pem .
 chown turnserver:turnserver *.pem
+
+# We should restart either coturn or LiveKit, they cannot run both!
 systemctl restart coturn
+#systemctl restart livekit-server
+
 ```
 
 Run this automatically after every renewal by adding this line to

matrix/element-call/README.md

@@ -196,6 +196,9 @@ lk-jwt-service, so it shouldn't be reachable from the outside world.
 
 The `xxx: xxxx` is the key and secret as generated before.
 
+See [LiveKit's config documentation](https://github.com/livekit/livekit/blob/master/config-sample.yaml)
+for more options.
+
 Now define a systemd servicefile, like this:
 
 ```