New DELL Icon & os.inc.php modifications for DELL PowerConnect 28XX Series

see topic

// Dell

$os = "powerconnect";
$config['os'][$os]['text'] = "Dell PowerConnect OS";
$config['os'][$os]['ifname'] = 1;
$config['os'][$os]['type'] = "network";
$config['os'][$os]['icon'] = "dell";
$config['os'][$os]['over'][0]['graph'] = "device_bits";
$config['os'][$os]['over'][0]['text'] = "Traffic";
$config['os'][$os]['sysObjectID'][] = ".1.3.6.1.4.1.674.10895.3026";
$config['os'][$os]['sysObjectID'][] = ".1.3.6.1.4.1.674.10895.3027";