dns: Actually drop the limit on the group we defined in the last commit.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/dns/files/named.conf

@@ -574,6 +574,10 @@ view "RDU2" {
 view "NA" {
         match-clients { US; CA; MX; };
         recursion no;
+        // no rate-limit on internal requests
+        rate-limit {
+             exempt-clients { ns_redhat; };
+        };
         zone "fedoraproject.org" {
                 type master;
                 file "/var/named/master/built/NA/fedoraproject.org.signed";