Manage cleanup of .ctl/.pid files for LibreSwan

[OpenStack Infra]

https://review.openstack.org/212673
commit 00b633d284f0f21aa380fa47a270c612ebef0795
Author: Brent Eagles <email address hidden>
Date: Thu Aug 13 13:35:36 2015 -0230

    Manage cleanup of .ctl/.pid files for LibreSwan

    LibreSwan checks for the presence of pid/ctl files when starting up and
    will error out if they already exist. However, LibreSwan's usage of the
    capabilities library removes the access required to cleanup .ctl and
    .pid files on shutdown if any of the directories in the path are missing
    explicit permissions for root. This is not considered a bug by the
    LibreSwan maintainers, so the LibreSwan driver must work around it by
    checking if it is okay to remove the files and removing them on
    startup. It must also wait for shutdown to complete before restarting
    the daemon on LibreSwanProcess.restart().

    Introduces new configuration for retrying check for process shutdown.

    DocImpact

    Change-Id: I5c215d70c348524979b740f882029f74e400e6d7
    Closes-Bug: #1331502

[Tom Fifield (fifieldt)]

Should be picked up by autogenerate-config-docs

[KATO Tomoyuki (kato-tomoyuki)]

At now, the category name "libreswan" is changed to "pluto".