* Changes
+ Make VpnService get dns info from vpn.dns1/dns2 and set
net.dns1/dns2.
+ Make VpnService wait on vpn.up instead of monitoring on ip-up-vpn.
+ Change commands sent to racoon.
+ Remove original sendCommand() from AndroidServiceProxy and rename
sendCommand2() to sendCommand().
+ Add L2tpIpsecPskService.java.
+ Add short stop after sending ipsec command.