Clean up the tls middleware README
# tls
-*tls* extra TLS configuration.
+*tls* allows you to configure the server certificates for the TLS and gRPC servers.
+For other types of servers it is ignored.
## Syntax
~~~ txt
-tls [STUFF]
+tls CERT KEY CA
~~~
-**STUFF** is things you'll need to configure TLS.
-
## Examples
+
+Start a DNS-over-TLS server.
+
+~~~
+tls://.:4453 {
+ tls cert.pem key.pem ca.pem
+ proxy . /etc/resolv.conf
+}
+~~~
+
+Start a DNS-over-gRPC server. If the `tls` directive were omitted, then
+it would use plain HTTP not HTTPS.
+
+~~~
+grpc://.:443 {
+ tls cert.pem key.pem ca.pem
+ proxy . /etc/resolv.conf
+}
+~~~
