The existing time plugin had a hard coded PDT for pacific timezone,
when it wasn't. This patch adds some real timezone conversion from
utc to the tz of the running aprsd server. This will eventually allow
us to use either the tz of the running aprsd and/or the tz of the
calling callsign if we can just get the tz string from the location
beacon of the caller's callsign.
The existing time plugin had a hard coded PDT for pacific timezone, when it wasn't. This patch adds some real timezone conversion from utc to the tz of the running aprsd server. This will eventually allow us to use either the tz of the running aprsd and/or the tz of the calling callsign if we can just get the tz string from the location beacon of the caller's callsign.