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$NetBSD: MESSAGE.common,v 1.2 2021/02/28 16:45:17 taca Exp $

0) Stop Redmine (if started). Like a good SysOp, you have scheduled
   downtime with your team already;

1) Migrate the plugin(s):

     # redmine${RM_SVER}_migrate_plugins${RUBY_SUFFIX}.sh

2) Start Redmine;