Adding new serverstart option for startup change

src/de/steamwar/bungeecore/Subserver.java

@@ -52,20 +52,22 @@ public class Subserver implements Runnable {
     }
 
     public Subserver(Servertype type, String serverName, int port, Runnable shutdownCallback, String... command){
+        this(type, serverName, port, new ProcessBuilder(command), shutdownCallback);
+    }
+
+    public Subserver(Servertype type, String serverName, int port, ProcessBuilder processBuilder, Runnable shutdownCallback){
         this.started = false;
         this.serverName = serverName;
         this.type = type;
         this.shutdownCallback = shutdownCallback;
 
-        ProcessBuilder pb = new ProcessBuilder(command);
-        InetSocketAddress address = new InetSocketAddress("127.0.0.1", port);
-
         try{
-            this.p = pb.start();
+            this.p = processBuilder.start();
         }catch(IOException e){
             throw new SecurityException("Server could not be started", e);
         }
 
+        InetSocketAddress address = new InetSocketAddress("127.0.0.1", port);
         this.server = ProxyServer.getInstance().constructServerInfo(
                 serverName, address, "SteamWar.de - Subserver", false);
         this.writer = new PrintWriter(p.getOutputStream(), true);