interfaces: fix crash report and deprecate 'hwif' ifinfo element

src/etc/inc/interfaces.inc

@@ -4912,10 +4912,11 @@ function get_interface_info($ifdescr)
     global $config;
 
     $ifinfo = array();
+
     if (empty($config['interfaces'][$ifdescr])) {
         return;
     }
-    $ifinfo['hwif'] = $config['interfaces'][$ifdescr]['if'];
+
     $ifinfo['if'] = get_real_interface($ifdescr);
 
     $chkif = $ifinfo['if'];
@@ -4925,7 +4926,7 @@ function get_interface_info($ifdescr)
     $ifinfo['subnet'] = $ifinfotmp['subnet'];
 
     $ifup = legacy_interface_listget('up');
-    $ifinfo['status'] = in_array($chkif, $ifup) ? 'up' : 'down';
+    $ifinfo['status'] = (is_array($ifup) && in_array($chkif, $ifup)) ? 'up' : 'down';
 
     $ifinfo['linklocal'] = get_interface_linklocal($ifdescr);
     $ifinfo['ipaddrv6'] = get_interface_ipv6($ifdescr);

src/www/status_interfaces.php

@@ -80,7 +80,7 @@ include("head.inc");
                       <tr>
                         <th colspan="2">
                           <i class="fa fa-chevron-down" style="cursor: pointer;" data-toggle="collapse" data-target="#<?= htmlspecialchars($ifname) ?>"></i>
-                          <?= htmlspecialchars($ifname) ?> <?= gettext("interface") ?> (<?= htmlspecialchars($ifdescr) ?>, <?= htmlspecialchars($ifinfo['hwif']) ?>)
+                          <?= htmlspecialchars($ifname) ?> <?= gettext("interface") ?> (<?= htmlspecialchars($ifdescr) ?>, <?= htmlspecialchars($ifinfo['if']) ?>)
   <?php
                           if (!isset($first_row)):
                             $first_row=false; ?>
@@ -440,7 +440,7 @@ include("head.inc");
                     $real_interface = "";
                     $interrupt_total = "";
                     $interrupt_sec = "";
-                    $real_interface = $ifinfo['hwif'];
+                    $real_interface = $ifinfo['if'];
                     $interrupt_total = `vmstat -i | grep $real_interface | awk '{ print $3 }'`;
                     $interrupt_sec = `vmstat -i | grep $real_interface | awk '{ print $4 }'`;
                     if(strstr($interrupt_total, "hci")) {