(filter) force a reload of filterdns when filter reloads, closes...

(filter) force a reload of filterdns when filter reloads, closes https://github.com/opnsense/core/issues/1396

src/etc/inc/filter.inc

@@ -589,12 +589,9 @@ function filter_configure_sync($verbose = false)
             }
         }
     }
-
+    killbypid('/var/run/filterdns.pid');
     if (!empty($filterdns)) {
         @file_put_contents('/var/etc/filterdns.conf', $filterdns);
-        if (isvalidpid('/var/run/filterdns.pid')) {
-            killbypid('/var/run/filterdns.pid', 'HUP');
-        } else {
         /*
          * FilterDNS has three debugging levels. The default choosen is 1.
          * Availabe are level 2 and greater then 2.
@@ -606,9 +603,6 @@ function filter_configure_sync($verbose = false)
         }
         mwexec("/usr/local/sbin/filterdns -p /var/run/filterdns.pid -i {$resolve_interval} -c /var/etc/filterdns.conf -d 1");
     }
-    } else {
-        killbypid('/var/run/filterdns.pid');
-    }
 
     update_filter_reload_status(gettext("Flushing schedule state"));