Comment # 5 on bug 1171211 from Jiri Slaby

In upstream as:
commit 5e698222c70257d13ae0816720dde57c56f81e15
Author: Vasily Averin <vvs@virtuozzo.com>
Date:   Wed May 13 17:50:48 2020 -0700

    ipc/util.c: sysvipc_find_ipc() incorrectly updates position index