Added optional Windows UPnP port forwading

src/misc/utils/UPnP.php

@@ -0,0 +1,61 @@
+<?php
+
+/*
+
+           -
+         /   \
+      /         \
+   /   PocketMine  \
+/          MP         \
+|\     @shoghicp     /|
+|.   \           /   .|
+| ..     \   /     .. |
+|    ..    |    ..    |
+|       .. | ..       |
+\          |          /
+   \       |       /
+      \    |    /
+         \ | /
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+
+*/
+
+function UPnP_PortForward($port){
+	if(Utils::getOS() != "win" or !class_exists("COM")){
+		return false;
+	}
+	$port = (int) $port;
+	$myLocalIP = gethostbyname(trim(`hostname`));
+	try{
+		$com = new COM("HNetCfg.NATUPnP");
+		if($com === false){
+			return false;
+		}	
+		$com->StaticPortMappingCollection->Add($port, "UDP", $port, $myLocalIP, true, "PocketMine-MP");
+	}catch(Exception $e){
+		return false;
+	}
+	return true;
+}
+
+function UPnP_RemovePortForward($port){
+	if(Utils::getOS() != "win" or !class_exists("COM")){
+		return false;
+	}
+	$port = (int) $port;
+	try{
+		$com = new COM("HNetCfg.NATUPnP") or false;
+		if($com === false){
+			return false;
+		}
+		$com->StaticPortMappingCollection->Remove($port, "UDP");
+	}catch(Exception $e){
+		return false;
+	}
+	return true;
+}