localspl: add Polish translation

[Jacek Caban]

Hi Mikołaj,

Mikołaj Zalewski wrote:
> +    IDS_NOTHINGTOCONFIG "Ten port nie ma opcji, kt�re mo�na by skonfigurowa�"
> +}
>   
It doesn't sound good to me. How about "Ten port nie ma opcji do
skonfigurowania" or just remove "by" from your version?

Jacek