One machine ran another time zone and a German console keymap with no record
why. The module writes /etc/locale.conf and /etc/vconsole.conf whole and sets
the zone through a run-once step of its own Go binary (timedatectl, read
back): /etc/localtime is a link the mesh may not write (hq ADR 0012) and a
module may not declare an action (ADR 0005). Tools: localization_get,
_time_zone, _locales, _keymaps (to-be 42 Phase 1).
