Workaround issues with lldp information from GS108Tv1 (#13971)

The GS108Tv1 doesn't present the same information over snmp as they do
over lldp. This tries to detect such a remote device and figure out
which remote port we actually should map it to.

includes/discovery/discovery-protocols.inc.php

@@ -347,6 +347,18 @@ if (($device['os'] == 'routeros')) {
                     $remote_port_name = (string) ($n_slot * 1000 + $n_port);
                 }
 
+                if ($remote_device['os'] == 'netgear' &&
+                    $remote_device['sysDescr'] == 'GS108T' &&
+                    $lldp['lldpRemSysDesc'] == 'Smart Switch') {
+                    // Some netgear switches, as Netgear GS108Tv1 presents it's port name over snmp as
+                    // "Port 1 Gigabit Ethernet" but as 'lldpRemPortId' => 'g1' and
+                    // 'lldpRemPortDesc' => 'Port #1' over lldp.
+                    // So remap g1 to 1 so it matches ifIndex
+                    if (preg_match("/^g(\d+)$/", $lldp['lldpRemPortId'], $matches)) {
+                        $remote_port_name = $matches[1];
+                    }
+                }
+
                 $remote_port_id = find_port_id(
                     $lldp['lldpRemPortDesc'],
                     $remote_port_name,