Allowed Add_Device API to set sysName (#10124)

sysName is a valid option via the WebGUI to set when SNMP is turned off. Currently you cannot set this via the API add device. This is to enable setting the sysName via the API.

includes/html/api_functions.inc.php

@@ -397,6 +397,7 @@ function add_device()
     $snmp_disable = ($data['snmp_disable']);
     if ($snmp_disable) {
         $additional = array(
+            'sysName'      => $data['sysName'] ? mres($data['sysName']) : '',
             'os'           => $data['os'] ? mres($data['os']) : 'ping',
             'hardware'     => $data['hardware'] ? mres($data['hardware']) : '',
             'snmp_disable' => 1,