Hung-ying Tyan 85646c1df3 Make VPN connect even when DNS is not present and other fixes.
* Changes:
  + As title.
  + Add two new states to VpnState: UNKNOWN and UNUSABLE.
  + Add more debug messages when stopping a service and when DNS being
    overridden.
2009-07-14 16:29:22 +08:00
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