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

[Andrew Cagney]

New commits:
commit b0f2e1240c3032a38cd94eedde443e784ed658a7
Author: Andrew Cagney <cagney at gnu.org>
Date:   Mon Apr 20 15:52:35 2020 -0400

    liveness: add, hopefully clearer, checks if probe needed
    
    - there's an IKE SA
    - there's been traffic less than .dpd_delay ago
    - there's a request outstanding (skip - log only for now)
    - there's a pending request (skip - log only for now)
    - there's a recently completed request
    
    However it then still gets to run the old liveness code which:
    
    - only starts a probe after .dpd_timeout seconds!!!
    - doesn't use retransmits to detect things are dead