Make "g_elapsedSeconds" much mure reliable by using rtos tics
Add a "clock" based on a simple startuptime + g_elapsedSeconds.

Can be set by Browser, by CMD or (experimentally) by the "Date:" statement given in a HTTP header.

Adds advanced possiblilty to auto adjust time to DST

All time-based commands are now available without "NTP" but a general "CLOCK" prefix:
There is no need to have e.g. "NTP_Get_Month" or "NTP_GetSunset" or "NTP_Events" - all these are CLOCK based
and only "bound" to NTP as the only clock source available.

Try to fix Windows build

TODO: change tests to use new commands

-> also enable new clock with WINDOWS

…p and running

Better display of time on every page (send time data as "dataset" of an HTML element)
NTP time will set local "device time", too

Update http_fns.c