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

[D. Hugh Redelmeier]

New commits:
commit 24f233b234fb3f8c19d70bfe1a65417e1fe4b094
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Sat Feb 9 12:48:36 2019 -0500

    pluto: tidying around certificate code
    
    - note and affirm that struct certs member "cert" is never NULL
    
    - reduce scope of some auto variables
    
    - eliminate pointless NULL initializers that might hide bugs