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

[D. Hugh Redelmeier]

New commits:
commit 2efd341909033b9f83e027ebaaea1f4c2e0e7348
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Thu May 31 17:36:02 2018 -0400

    pluto: replace idiom delete_event(); event_schedule_s(,0,) with event_force()

commit 8b1ccc998c950ed98a9ea963866f1c4518ac8869
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Thu May 31 16:58:19 2018 -0400

    pluto: slightly clarify delete_or_replace_state()