Bug#1051973: tzdata: no warning about moving US/* to tzdata-legacy

[Mike Kupfer <kupfer@rawbw.com>]

Package: tzdata
Version: 2023c-10
Severity: important
X-Debbugs-Cc: kupfer@rawbw.com

Dear Maintainer,

After using synaptic or apt to upgrade tzdata from 2023c-7 to
2023c-10, I would get the wrong time in my desktop environments and on
a virtual terminal (no X).  I would get UTC, rather than my local
time.  Though the lightdm screen would display the correct time.

I tracked this down to the fix for #1040997.  So, changing TZ from
US/Pacific to America/Los_Angeles makes the problem go away.  Or,
keeping TZ at US/Pacific, installing tzdata-legacy makes the problem
go away.

I'm okay with the change itself, but it really should get more
visibility.  That is, on upgrade the user should get some sort of
heads-up that they are getting an incompatible change and may need to
take corrective action.

thanks,
mike

-- System Information:
Debian Release: trixie/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.4.0-3-amd64 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages tzdata depends on:
ii  debconf [debconf-2.0]  1.5.82

tzdata recommends no packages.

tzdata suggests no packages.

-- debconf information:
  tzdata/Zones/Pacific:
  tzdata/Zones/Africa:
  tzdata/Zones/Europe:
  tzdata/Zones/Arctic:
* tzdata/Zones/America: Los_Angeles
* tzdata/Areas: America
* tzdata/Zones/Etc: UTC
  tzdata/Zones/Australia:
  tzdata/Zones/Antarctica:
  tzdata/Zones/US:
  tzdata/Zones/Indian:
  tzdata/Zones/Atlantic:
  tzdata/Zones/SystemV:
  tzdata/Zones/Asia: