Added SyslogUdpHandler.

This handler lets you log to a remote syslogd server via UPD. The
use-case here is having many webservers, and the need to gather log-
files on a centralized server.

tests/Monolog/Handler/SyslogUdpHandlerTest.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Monolog\Handler;
+
+use Monolog\TestCase;
+
+class SyslogUdpHandlerTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testWeValidateFacilities()
+    {
+        $handler = new SyslogUdpHandler("loiwjefoiwjef", "ip");
+    }
+
+    public function testWeSplitIntoLines()
+    {
+        $handler = new SyslogUdpHandler("local5", "127.0.0.1");
+        $handler->setFormatter(new \Monolog\Formatter\ChromePHPFormatter());
+
+        $socket = $this->getMock('\Monolog\Handler\SyslogUdp\UdpSocket', ['write'], ['lol', 'lol']);
+        $socket->expects($this->at(0))
+            ->method('write')
+            ->with("lol", "<172>: ");
+        $socket->expects($this->at(1))
+            ->method('write')
+            ->with("hej", "<172>: ");
+
+        $handler->setSocket($socket);
+
+        $handler->handle($this->getRecordWithMessage("hej\nlol"));
+    }
+
+    protected function getRecordWithMessage($msg)
+    {
+        return ['message' => $msg, 'level' => \Monolog\Logger::WARNING, 'context' => null, 'extra' => [], 'channel' => 'lol'];
+    }
+}