[patch] allow seeking in linear files

[Pavel Tsekov]

On Fri, 20 Jan 2006, Jindrich Makovicka wrote:

> this patch adds an ability to seek in linear files before the first read
> operation. It is achieved by postponing the actual opening to
> linear_read() call. The main reason of this is to make ftpfs' reget
> function work again.
>
> Modification for fish to work with this change, and a minor fix of the
> ftpfs copy status display is included.

I've commited your patch with minor changes. Next time, please, provide
a changelog.

Thanks!