Update 20-dns-syslog.conf

fix for https://github.com/nin9s/elk-hole/issues/19

logstash/conf.d/20-dns-syslog.conf

@@ -164,8 +164,6 @@ filter {
       }
 
 
-
-
   mutate {
       add_field => {
         "[source_fqdn]" => "%{source_host}"
@@ -189,6 +187,7 @@ filter {
   }
 }
 
+
 output {
 #       stdout { codec => rubydebug }
         if "pihole" in [tags]{
@@ -199,4 +198,3 @@ output {
                 }
         }
 }
-