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

[Andrew Cagney]

New commits:
commit 983a855e0d39cd96626c8a3a2970ee5d17ba1ecf
Author: Andrew Cagney <cagney at gnu.org>
Date:   Tue Nov 21 10:14:39 2017 -0500

    timers: replace UNDEFINED_TIME with monotime_epoch
    
    Clean up use in retransmit.[hc].