firewall: fix alias truncation (up to 5k only)

PR: https://forum.opnsense.org/index.php?topic=2517.0
(cherry picked from commit 877b317f)

src/etc/rc.php_ini_setup

@@ -102,6 +102,7 @@ implicit_flush = true
 magic_quotes_gpc = Off
 max_execution_time = 900
 max_input_time = 1800
+max_input_vars = 5000
 register_argc_argv = On
 register_long_arrays = Off
 variables_order = "GPCS"

src/www/firewall_aliases_edit.php

@@ -489,12 +489,12 @@ include("head.inc");
                                   <input type="text" class="fld_detail"  name="host_url[]" value="<?=$address;?>"/>
                                 </td>
                                 <td>
-                                  <input type="text" name="detail[]" value="<?= isset($detail_desc[$addressid])?$detail_desc[$addressid]:"";?>"?>
+                                  <input type="text" name="detail[]" value="<?= isset($detail_desc[$addressid])?$detail_desc[$addressid]:"";?>"/>
                                 </td>
                                 <td>
 <?php                          if ($addressid ==0):
 ?>
-                                  <input type="text" class="input-sm" id="updatefreq" name="updatefreq" value="<?=$pconfig['updatefreq'];?>" >
+                                  <input type="text" class="input-sm" id="updatefreq" name="updatefreq" value="<?=$pconfig['updatefreq'];?>"/>
 <?php                          endif;
 ?>
                                 </td>