Only replace dst.conf upon changed values
Two weeks are enough to search for the second sunday
Stop the loop when proper sunday is found
Move some single shot variables
Modify mathweek to return the found value
Don't modify the actual system date within mathweek
Issue log message only on startup
Allow an optional date filename for service_ntp_start
Simplify cron-ntp
Early exit from cron-ntp when DST management is disabled
Store date only after fixing DST
BUGFIX : don't correct GMT shift if DST disabled
BUGFIX : store current date even when DST is disabled
Use abbreviated weekday name
REFACTORING : use better variable name
BUGFIX : fix function return value
Fix initial content of config partition
Remove duplicated echo
Simplify duplicated code for DST correction
Simplify detection of saving time