Fix for fwmark (#279)

util/util.go

@@ -65,18 +65,12 @@ func BuildClientConfig(client model.Client, server model.Server, setting model.G
 		peerPersistentKeepalive = fmt.Sprintf("PersistentKeepalive = %d\n", setting.PersistentKeepalive)
 	}
 
-	forwardMark := ""
-	if setting.ForwardMark != "" {
-		forwardMark = fmt.Sprintf("FwMark = %s\n", setting.ForwardMark)
-	}
-
 	// build the config as string
 	strConfig := "[Interface]\n" +
 		clientAddress +
 		clientPrivateKey +
 		clientDNS +
 		clientMTU +
-		forwardMark +
 		"\n[Peer]\n" +
 		peerPublicKey +
 		peerPresharedKey +