init: Create new 'vpn' user/group and set owner of '/dev/tun' to it.

Signed-off-by: San Mehat <san@google.com>
diff --git a/include/private/android_filesystem_config.h b/include/private/android_filesystem_config.h
index a47f2e4..6ed5514 100644
--- a/include/private/android_filesystem_config.h
+++ b/include/private/android_filesystem_config.h
@@ -49,6 +49,7 @@
 #define AID_MEDIA         1013  /* mediaserver process */
 #define AID_DHCP          1014  /* dhcp client */
 #define AID_SDCARD_RW     1015  /* external storage write access */
+#define AID_VPN           1016  /* vpn system */
 
 #define AID_SHELL         2000  /* adb and debug shell user */
 #define AID_CACHE         2001  /* cache access */
@@ -95,6 +96,7 @@
     { "net_bt_admin", AID_NET_BT_ADMIN, },
     { "net_bt",    AID_NET_BT, },
     { "sdcard_rw", AID_SDCARD_RW, },
+    { "vpn",       AID_VPN, },
     { "inet",      AID_INET, }, 
     { "net_raw",   AID_NET_RAW, },
     { "misc",      AID_MISC, },