bug#33149: Please add a "calender-use-numeric-time-zone-names" variable

[積丹尼 Dan Jacobson]

>>>> In Calendar, if one doesn't want to see ambiguous time zones names,
>>>> like "CST",
>>>> in .emacs one must put e.g.,
>>>> (setq calendar-standard-time-zone-name "+0800")

                                             ^^^^^^had to hardwire a
                                             certain number, because
                                             there is no way to tell it
                                             to just show me numbers,
                                             instead of names.

LI> So where are you seeing these time zones?  Please provide a recipe to
LI> see the problem.

$ emacs -Q -nw -f calendar
S [calendar-sunrise-sunset]
120.2 24 [longitude latitude]

Aug 9, 2020: Sunrise 5:33am (CST), sunset 6:36pm (CST) at 24N, 120.2E (13:03 
hrs daylight)