- use UTC="--localtime" by default
- evaluate tz bootoption in this function as well
- execute hwclock even if /dev/rtc isn't available, just display
warning regarding the lack of /dev/rtc
- use UTC="--localtime" by default
- evaluate tz bootoption in this function as well
- execute hwclock even if /dev/rtc isn't available, just display
warning regarding the lack of /dev/rtc