+* NTP: the kernel's 11-minutes-mode syncs the system time to the RTC, but only
+ in an ~30 minutes window. It does not adjust larger differences. Find a way
+ to tell the kernel, to always do a full time sync when the RTC is in UTC and
+ we are in 11-minutes-mode. When we trust the system time to NTP we also want
+ the RTC to sync up.
+