saltstack/salt — pull request #10615 by gtmanfred (2014-02-20 13:24:12+00:00)
Title: Only default to sysupgrade if refresh is True and sysupgrade is None.

This still sets the default of -S, without requiring you to specifically
set sysupgrade=False if you continuously refresh your database every 5
minutes and don't want to do a complete system upgrade.