[PATCH v3 2/2] Documentation: add extlinux.conf support description

[Alexander Shiyan]

Hello All.

> diff --git a/Documentation/user/booting-linux.rst b/Documentation/user/booting-linux.rst
> index 7bbb79ecdf..d74cc934aa 100644
> --- a/Documentation/user/booting-linux.rst
> +++ b/Documentation/user/booting-linux.rst
...
> +When booting an extlinux entry, barebox strips any ``root=`` parameter from the
> +``APPEND`` line **only if** the global variable ``global.bootm.appendroot`` is
> +set to true. After stripping, barebox injects the correct ``root=`` based on
> +the boot device (similar to the ``linux-appendroot`` feature in blspec). This
> +makes the same root filesystem image usable across different storage media.
...

This block needs to be removed if the patch is applied.
I copied and pasted it by mistake.