"check-names primary" and "check-names secondary" were ignored

these keywords were added to the parser as synonyms for "master"
and "slave" but were never hooked in to the configuration of named,
so they were ignored. this has been fixed and the option is now
checked for correctness.

(cherry picked from commit ba31b189b4)

bin/tests/system/checkconf/good.conf

@@ -72,6 +72,8 @@ options {
 	recursive-clients 3000;
 	serial-query-rate 100;
 	server-id none;
+	check-names primary warn;
+	check-names secondary ignore;
 	max-cache-size 20000000000000;
 	nta-lifetime 604800;
 	nta-recheck 604800;