(firewall, ui) remove IPV6 as valid protocol selection

src/www/firewall_nat_edit.php

@@ -618,7 +618,7 @@ $( document ).ready(function() {
                   <td>
                     <div class="input-group">
                       <select id="proto" name="protocol" class="selectpicker" data-live-search="true" data-size="5" data-width="auto">
-<?php                foreach (explode(" ", "TCP UDP TCP/UDP ICMP ESP AH GRE IPV6 IGMP PIM OSPF") as $proto):
+<?php                foreach (explode(" ", "TCP UDP TCP/UDP ICMP ESP AH GRE IGMP PIM OSPF") as $proto):
 ?>
               <option value="<?=strtolower($proto);?>" <?= strtolower($proto) == $pconfig['protocol'] ? "selected=\"selected\"" : ""; ?>>
                           <?=$proto;?>

src/www/firewall_nat_out_edit.php

@@ -444,7 +444,7 @@ include("head.inc");
                   <td>
                     <div class="input-group">
                       <select id="proto" name="protocol" class="selectpicker" data-live-search="true" data-size="5" data-width="auto">
-<?php                foreach (array("any" => gettext("any"), "TCP" => gettext("TCP"), "UDP" => gettext("UDP"), "TCP/UDP" => gettext("TCP/UDP"), "ICMP" => gettext("ICMP"), "ESP" => gettext("ESP"), "AH" => gettext("AH"), "GRE" => gettext("GRE"), "IPV6" => gettext("IPV6"), "IGMP" => gettext("IGMP"), "PIM" => gettext("PIM"), " OSPF" => gettext("OSPF")) as $proto => $proto_translated):
+<?php                foreach (array("any" => gettext("any"), "TCP" => gettext("TCP"), "UDP" => gettext("UDP"), "TCP/UDP" => gettext("TCP/UDP"), "ICMP" => gettext("ICMP"), "ESP" => gettext("ESP"), "AH" => gettext("AH"), "GRE" => gettext("GRE"), "IGMP" => gettext("IGMP"), "PIM" => gettext("PIM"), " OSPF" => gettext("OSPF")) as $proto => $proto_translated):
 ?>
               <option value="<?=strtolower($proto);?>" <?= strtolower($proto) == $pconfig['protocol'] ? "selected=\"selected\"" : ""; ?>><?=$proto_translated?></option>
 <?php                endforeach; ?>

src/www/firewall_rules_edit.php

@@ -837,7 +837,7 @@ include("head.inc");
                     <td>
                       <select <?=!empty($pconfig['associated-rule-id']) ? "disabled" : "";?> name="protocol" id="proto" class="selectpicker" data-live-search="true" data-size="5" >
 <?php
-                      $protocols = explode(" ", "any TCP UDP TCP/UDP ICMP ESP AH GRE IPV6 IGMP PIM OSPF carp pfsync");
+                      $protocols = explode(" ", "any TCP UDP TCP/UDP ICMP ESP AH GRE IGMP PIM OSPF carp pfsync");
                       foreach ($protocols as $proto): ?>
                         <option value="<?=strtolower($proto);?>" <?= strtolower($proto) == $pconfig['protocol'] ? "selected=\"selected\"" :""; ?>>
                           <?=$proto;?>