(legacy) fix PHP Fatal error: Call to undefined function...

(legacy) fix PHP Fatal error:  Call to undefined function create_gateway_quality_rrd() in /usr/local/etc/inc/gwlb.inc on line 330

setup_gateways_monitor needs rrd.inc

src/etc/inc/xmlrpc/legacy.inc

@@ -196,6 +196,7 @@ function filter_configure_xmlrpc()
     require_once("vslb.inc");
     require_once("openvpn.inc");
     require_once("services.inc");
+    require_once("rrd.inc");
 
     filter_configure();
     system_routing_configure();

src/etc/rc.filter_configure_xmlrpc

@@ -42,6 +42,7 @@ require_once("vslb.inc");
 require_once("system.inc");
 require_once("pfsense-utils.inc");
 require_once("services.inc");
+require_once("rrd.inc");
 
 system_routing_configure();
 setup_gateways_monitor();

src/www/system_gateway_groups.php

@@ -32,6 +32,7 @@ require_once("interfaces.inc");
 require_once("openvpn.inc");
 require_once("system.inc");
 require_once("pfsense-utils.inc");
+require_once("rrd.inc");
 
 // Resync and restart all VPNs using a gateway group.
 function openvpn_resync_gwgroup($gwgroupname = "") {

src/www/system_gateways.php

@@ -33,6 +33,7 @@ require_once("filter.inc");
 require_once("services.inc");
 require_once("system.inc");
 require_once("pfsense-utils.inc");
+require_once("rrd.inc");
 
 $a_gateways = return_gateways_array(true, false, true);
 $a_gateways_arr = array();

src/www/system_routes.php

@@ -32,6 +32,7 @@ require_once("interfaces.inc");
 require_once("filter.inc");
 require_once("system.inc");
 require_once("pfsense-utils.inc");
+require_once("rrd.inc");
 
 if (!is_array($config['staticroutes'])) {
     $config['staticroutes'] = array();