Make CNTR file include timezone and seconds

[Didr]

Currently the resulting CNTR file after mission end doesn't include seconds or data about the server timezone. We'd like this data to make cntr-stats more accurate.

Especially the timezone data: Either make the exported file always be UTC, or include it in the data or name somehow.
Seconds could be included in the filename, just like the hours and minutes.

[Didr]

This should be the line that needs to be modified:
https://github.com/CntoDev/CNTR/blob/master/extensions/cntr_exporter/library.cpp#L81

Preferably make it UTC.