firmware: reconfigure on reload; kill backend webgui call

Backend can't call tainted code that may run configd again.  This needs
to be cleaned up.  Ideally, the backend should only call python code.

src/etc/rc.restart_webgui

@@ -5,14 +5,16 @@ require_once('config.inc');
 require_once('interfaces.inc');
 require_once('captiveportal.inc');
 require_once('rrd.inc');
-require_once("util.inc");
-require_once("system.inc");
+require_once('util.inc');
+require_once('system.inc');
 
 if (count($argv) > 1 && is_numeric($argv[1])) {
     // starting delayed.
     sleep($argv[1]);
 }
 
+system_firmware_configure();
+
 echo 'Restarting webConfigurator...';
 
 killbyname('lighttpd');

src/opnsense/service/conf/actions.d/actions_webgui.conf

-[reload|restart]
-command:/usr/local/etc/rc.restart_webgui
-parameters:%s
-type:script
-message:webConfigurator restart in progress

src/www/diag_logs_settings.php

@@ -206,7 +206,7 @@ if ($_POST['resetlogs'] == gettext("Reset Log Files")) {
 			ob_flush();
 			flush();
 			log_error(gettext("webConfigurator configuration has changed. Restarting webConfigurator."));
-			configd_run("webgui restart 2", true);
+			mwexec_bg('/usr/local/etc/rc.restart_webgui 2');
 			$savemsg .= "<br />" . gettext("WebGUI process is restarting.");
 		}
 

src/www/system_advanced_admin.php

@@ -683,5 +683,5 @@ if ($restart_webgui) {
     ob_flush();
     flush();
     log_error(gettext("webConfigurator configuration has changed. Restarting webConfigurator."));
-    configd_run("webgui restart 2", true);
+    mwexec_bg('/usr/local/etc/rc.restart_webgui 2');
 }