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

[D. Hugh Redelmeier]

New commits:
commit 53398735a0c20d96d09574dd939947f159ce7657
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Sun Jul 22 19:37:07 2018 -0400

    addcon, pluto: complain at runtime when NETKEY is needed but not available