From: Jon Maloy
Date: Mon, 18 Dec 2017 18:13:34 +0100
> A group member going into state LEAVING should never go back to any
> other state before it is finally deleted. However, this might happen
> if the socket needs to send out a RECLAIM message during this interval.
> Since we forget to remove
A group member going into state LEAVING should never go back to any
other state before it is finally deleted. However, this might happen
if the socket needs to send out a RECLAIM message during this interval.
Since we forget to remove the leaving member from the group's 'active'
or 'pending' list,
