[Swan-commit] Changes to ref refs/heads/master

[Andrew Cagney]

New commits:
commit c775e51032cd721db2d80ab6de6fd4685e9ec156
Author: Andrew Cagney <cagney at gnu.org>
Date:   Wed Jan 15 22:10:35 2020 -0500

    testing: use IPv6DuplicateAddressDetection=0 to stop D.A.D.