bug#12044: 24.1; ls does not support --dired

[Glenn Morris]

Peter Dyballa wrote:

>> Please give the details of how it "fails to work".
>
> It reports
>
>       ls does not support --dired; see `dired-use-ls-dired' for more details.

And when you read the documentation of dired-use-ls-dired, what was
unclear?

> Previously I could simply
>
>       (setq dired-use-ls-dired "gls --dired")

Why would you do this? It is a boolean option.