Always set the NAS identifier; if not set fall back to the hostname (#28)

* Always set the NAS identifier; if not set fall back to the hostname

* Refrain from setting NAS-IP-Address

Author: tvdijen

src/Auth/Source/Radius.php

@@ -157,11 +157,7 @@ protected function login(
             $radius->setIncludeMessageAuthenticator();
 
             $httpUtils = new Utils\HTTP();
-            $radius->setNasIpAddress($_SERVER['SERVER_ADDR'] ?: $httpUtils->getSelfHost());
-
-            if ($this->nasIdentifier !== null) {
-                $radius->setAttribute((string)self::RADIUS_NAS_IDENTIFIER, $this->nasIdentifier);
-            }
+            $radius->setAttribute((string)self::RADIUS_NAS_IDENTIFIER, $this->nasIdentifier ?: $httpUtils->getSelfHost());
 
             if ($this->realm !== null) {
                 $radius->setRadiusSuffix('@' . $this->realm);