Add unofficial time zone updates

[andrew-hoffman]

Please include this unofficial update for the time zone data. This is a really minor annoyance but I was reminded of it yesterday when all my clocks on Win98 VMs were set an hour off because the DST dates were changed in 2007.

https://www.mdgx.com/add.htm#TZU

[oerg866]

Good idea, convenience with 0 downsides.. will do