firewall: removed NAT+proxy, this option is unused

(cherry picked from commit e24d1970)

src/www/system_advanced_firewall.php

@@ -65,7 +65,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     }
     $pconfig['enablebinatreflection'] = !empty($config['system']['enablebinatreflection']);
     $pconfig['enablenatreflectionhelper'] = isset($config['system']['enablenatreflectionhelper']) ? $config['system']['enablenatreflectionhelper'] : null;
-    $pconfig['reflectiontimeout'] = !empty($config['system']['reflectiontimeout']) ? $config['system']['reflectiontimeout'] : null;
     $pconfig['bypassstaticroutes'] = isset($config['filter']['bypassstaticroutes']);
     $pconfig['disablevpnrules'] = isset($config['system']['disablevpnrules']);
 } elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
@@ -92,9 +91,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     if (!empty($pconfig['maximumtableentries']) && !is_numericint($pconfig['maximumtableentries'])) {
         $input_errors[] = gettext("The Firewall Maximum Table Entries value must be an integer.");
     }
-    if (!empty($pconfig['reflectiontimeout']) && !is_numericint($pconfig['reflectiontimeout'])) {
-        $input_errors[] = gettext("The Reflection timeout must be an integer.");
-    }
     if (count($input_errors) == 0) {
 
         if (!empty($pconfig['lb_use_sticky'])) {
@@ -174,7 +170,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         $config['system']['maximumstates'] = $pconfig['maximumstates'];
         $config['system']['aliasesresolveinterval'] = $pconfig['aliasesresolveinterval'];
         $config['system']['maximumtableentries'] = $pconfig['maximumtableentries'];
-        $config['system']['reflectiontimeout'] = $pconfig['reflectiontimeout'];
 
         if (!empty($pconfig['bypassstaticroutes'])) {
             $config['filter']['bypassstaticroutes'] = $pconfig['bypassstaticroutes'];
@@ -285,17 +280,6 @@ include("head.inc");
                     </div>
                   </td>
                 </tr>
-                <tr>
-                  <td><a id="help_for_reflectiontimeout" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Reflection Timeout");?></td>
-                  <td>
-                    <input name="reflectiontimeout" type="text" value="<?=$pconfig['reflectiontimeout']; ?>" />
-                    <div class="hidden" for="help_for_reflectiontimeout">
-                      <strong><?=gettext("Enter value for Reflection timeout in seconds.");?></strong>
-                      <br /><br />
-                      <?=gettext("Note: Only applies to Reflection on port forwards in NAT + proxy mode.");?>
-                    </div>
-                  </td>
-                </tr>
                 <tr>
                   <td><a id="help_for_enablebinatreflection" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Reflection for 1:1");?></td>
                   <td>