Remove option dnssec-validation as the default (auto) is the correct setting (#5928)

Author: Thom Pol

install/tpl/named.conf.options.master

@@ -18,7 +18,6 @@ options {
 	// If BIND logs error messages about the root key being expired,
 	// you will need to update your keys.  See https://www.isc.org/bind-keys
 	//========================================================================
-	dnssec-validation yes;
 
 	version "unknown";