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

[Andrew Cagney]

New commits:
commit efad31c1b8d125c6dd4478f7113b6d4df28d5e8f
Author: Andrew Cagney <cagney at gnu.org>
Date:   Fri Mar 27 21:51:00 2020 -0400

    ip: address_invalid->unset_address, !address_is_invalid()->address_is_set(), et.al.
    
    Avoid double negative with !address_is_invalid().