git: zoneinfo: Update /etc/localtime when upgrading timezones.

[Sascha Wildner]

commit d87a94cbd2d9f228fef8042f1d6908b6467ae057
Author: Sascha Wildner <saw at online.de>
Date:   Mon Aug 24 21:04:04 2020 +0200

    zoneinfo: Update /etc/localtime when upgrading timezones.
    
    * Add tzsetup(8) to the bootstrap-tools.
    
    * Install the backward file to retain obsolete timezones as links
      for backward compatibility. Remove all these timezones from
      Makefile_upgrade.inc again. Also extend mtree/BSD.usr.dist for
      this and remove the old 'dragonfly' file (which was only for UTC).
    
    * After installing new timezones, run tzsetup -r to upgrade the user's
      chosen timezone. Allow this to fail for quickworlders. It will start
      working after the next full buildworld.
    
    Taken-from: FreeBSD (with modifications)

Summary of changes:
 Makefile.inc1            |  2 +-
 Makefile_upgrade.inc     | 25 -------------------------
 etc/mtree/BSD.usr.dist   | 10 ++++++++++
 share/zoneinfo/Makefile  | 26 +++++++++++++++++++++-----
 share/zoneinfo/dragonfly |  3 ---
 5 files changed, 32 insertions(+), 34 deletions(-)
 delete mode 100644 share/zoneinfo/dragonfly

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d87a94cbd2d9f228fef8042f1d6908b6467ae057


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