Description of VPNaaS libreSwan plug-in configuration options

Configuration option = Default value	Description
[libreswan]
shutdown_check_back_off = 1.5	(FloatOpt) A factor to increase the retry interval for each retry
shutdown_check_retries = 5	(IntOpt) The maximum number of retries for checking for pluto daemon shutdown
shutdown_check_timeout = 1	(IntOpt) Initial interval in seconds for checking if pluto daemon is shutdown