VPNC bugfix for v0.9.0

[zero88]

Describe the bug

• [x] Must use VPN hub as root DNS instead of VPN account
• [x] Upgrade VPN account does not start and lease correct IP with previous state
• [x] Keep restarting VPN client constantly in every command

Improvement

• [x] Wait VPN connection success (current is 30s) then lease VPN IP
• [x] VPN status show whether app is installed or not, and show PID if running

Version

INFO : VPN version : v4.29-9680-rtm
INFO : CLI version : 0.9.0
INFO : Hash version: 816a6d2