update test to check default value for rfc parameter

Author: gwinn

Tests/DependencyInjection/ConfigurationTest.php

@@ -430,6 +430,26 @@ public function testWithSyslogUdpHandler()
         $this->assertEquals(514, $config['handlers']['syslogudp']['port']);
         $this->assertEquals(0, $config['handlers']['syslogudp']['rfc']);
 
+        $configs = [
+            [
+                'handlers' => [
+                    'syslogudp' => [
+                        'type' => 'syslogudp',
+                        'host' => '127.0.0.1',
+                        'port' => 514,
+                        'facility' => 'USER',
+                        'level' => 'ERROR'
+                    ]
+                ]
+            ]
+        ];
+        $config = $this->process($configs);
+
+        $this->assertEquals('syslogudp', $config['handlers']['syslogudp']['type']);
+        $this->assertEquals('127.0.0.1', $config['handlers']['syslogudp']['host']);
+        $this->assertEquals(514, $config['handlers']['syslogudp']['port']);
+        $this->assertEquals(1, $config['handlers']['syslogudp']['rfc']);
+
         $configs = [
             [
                 'handlers' => [