Add config entry for OverseaLogPort (default: 8888)

src/main/java/emu/grasscutter/Config.java

@@ -13,6 +13,7 @@ public final class Config {
 	public String GameServerPublicIp = "";
 	public int GameServerPort = 22102;
 	
+	public int OverseaLogPort = 8888;
 	public int UploadLogPort = 80;
 	
 	public String DatabaseUrl = "mongodb://localhost:27017";

src/main/java/emu/grasscutter/server/dispatch/DispatchServer.java

@@ -410,7 +410,7 @@ public final class DispatchServer {
 		Grasscutter.getLogger().info("Dispatch server started on port " + getAddress().getPort());
 		
 		// Logging servers
-		HttpServer overseaLogServer = HttpServer.create(new InetSocketAddress(Grasscutter.getConfig().DispatchServerIp, 8888), 0);
+		HttpServer overseaLogServer = HttpServer.create(new InetSocketAddress(Grasscutter.getConfig().DispatchServerIp, Grasscutter.getConfig().OverseaLogPort), 0);
 		overseaLogServer.createContext( // overseauspider.yuanshen.com
 				"/log", 
 				new DispatchHttpJsonHandler("{\"code\":0}")