Since a while relayd switched from the TLS session cache to using only TLS

session tickets instead. Adjust example relayd.conf file.
From Matt Schwartz, reminded by jmc@ OK deraadt@

src/etc/examples/relayd.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: relayd.conf,v 1.3 2014/12/12 10:05:09 reyk Exp $
+# $OpenBSD: relayd.conf,v 1.4 2018/03/23 09:55:06 claudio Exp $
 #
 # Macros
 #
@@ -46,7 +46,7 @@ http protocol https {
 	tcp { nodelay, sack, socket buffer 65536, backlog 128 }
 
 #	tls { no tlsv1.0, ciphers HIGH }
-#	tls session cache disable
+#	tls no session tickets
 }
 
 relay wwwtls {