- Fix build on 10.3. strncat() was not available in libkern. Actually,

there is no point of using strncat() here because the length of tail is len.
- Remove few empty lines while I am here.

emulators/virtualbox-ose-additions/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	virtualbox-ose
 PORTVERSION=	5.1.22
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	emulators
 MASTER_SITES=	http://download.virtualbox.org/virtualbox/${PORTVERSION}/
 PKGNAMESUFFIX?=	-additions

emulators/virtualbox-ose/files/patch-src_VBox_Additions_freebsd_vboxvfs_vboxvfs__prov.c

@@ -1,6 +1,6 @@
 --- src/VBox/Additions/freebsd/vboxvfs/vboxvfs_prov.c.orig	1970-01-01 01:00:00.000000000 +0100
 +++ src/VBox/Additions/freebsd/vboxvfs/vboxvfs_prov.c	2017-07-12 19:24:26.109029000 +0200
-@@ -0,0 +1,1021 @@
+@@ -0,0 +1,1020 @@
 +/*
 + * Copyright (C) 2008-2016 Oracle Corporation
 + *
@@ -311,7 +311,6 @@
 +	sfp_file_t **fp,
 +	sffs_stat_t *stat)
 +{
-+
 +	int rc;
 +	SHFLCREATEPARMS parms;
 +	SHFLSTRING *str;

emulators/virtualbox-ose/files/patch-src_VBox_Additions_freebsd_vboxvfs_vboxvfs__vnops.c

@@ -12,7 +12,7 @@
   *
   * This file is part of VirtualBox Open Source Edition (OSE), as
   * available from http://www.virtualbox.org. This file is free software;
-@@ -14,228 +9,1336 @@
+@@ -14,228 +9,1334 @@
   * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
   * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
   */
@@ -521,7 +521,7 @@
 +	p = malloc(strlen(node->sf_path) + 1 + len + 1, M_VBOXVFS, M_WAITOK);
 +	strcpy(p, node->sf_path);
 +	strcat(p, "/");
-+	strncat(p, tail, len);
++	strcat(p, tail);
 +	return (p);
 +}
 +
@@ -610,7 +610,6 @@
 +static int
 +vboxfs_close(struct vop_close_args *ap)
 +{
-+
 +	struct vnode *vp = ap->a_vp;
 +	struct vboxfs_node *np;
 +
@@ -719,7 +718,6 @@
 +static int
 +vboxfs_setattr(struct vop_setattr_args *ap)
 +{
-+
 +	struct vnode 		*vp = ap->a_vp;
 +	struct vattr 		*vap = ap->a_vap;
 +	struct vboxfs_node	*np = VP_TO_VBOXFS_NODE(vp);