Merge change 5455 into donut

* changes:
  Add new PPP IPCP script for VPN.

rootdir/etc/ppp/ip-up-vpn

+#!/system/bin/sh
+
+/system/bin/setprop "vpn.dns1" "$DNS1"
+/system/bin/setprop "vpn.dns2" "$DNS2"
+
+GATEWAY=${6#*@}
+VPNSERVER=${6%@*}
+
+# Protect the route to vpn server
+/system/bin/route add -net "$VPNSERVER" netmask 255.255.255.255 gw "$GATEWAY"
+
+if (exp $?) ; then exit $?; fi
+
+# Route all traffic to vpn connection
+/system/bin/route add -net 0.0.0.0 netmask 128.0.0.0 gw $IPREMOTE
+/system/bin/route add -net 128.0.0.0 netmask 128.0.0.0 gw $IPREMOTE
+
+/system/bin/setprop "vpn.up" "1"