int vshPowerSetPowerSwMode(int mode)
returns 0 if successful.
mode values:
0 - press does nothing, long press opens shutdown menu like usual;
1 - press does nothing, long press immediately shuts down;
2 - press immediately suspends, long press opens shutdown menu like usual;
3 - press immediately suspends, long press immediately shuts down;
4 - same as normal?
5 - same as normal?
6 - same as normal?
7 - press suspends as normal, long press immediately shuts down;